{"title":"OXIDES, HYDROXIDES","description":"\u003cp\u003eThe oxide mineral class comprises minerals where the oxide anion (O2−) is combined with one or more metal alloys. Typically, minerals containing hydroxide are categorized within this class. In contrast, minerals featuring complex anion groups, such as silicates, sulfates, carbonates, and phosphates, are classified separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease, click on the picture for more pictures and details like dimensions (like 300 240 340 (LWD in mm), weight (in grams), locality and specimen number (SKU)).\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"actinolite-uralite-diopside","title":"ACTINOLITE VARIETY URALITE (AFTER DIOPSIDE), QUARTZ, CALUMET MINE, CHAFFEE COUNTY, COLORADO, USA (small cabinet)","description":"\u003cp\u003e Actinolite is a silicate mineral belonging to the amphibole group, characterized by the chemical formula Ca2(Mg4.5–2.5Fe2+0.5–2.5)Si8O22(OH)2.\u003c\/p\u003e\n\u003cp\u003eIts name originates from the Greek term aktis, which translates to \"beam\" or \"ray,\" reflecting its fibrous structure.\u003c\/p\u003e\n\u003cp\u003eActinolite serves as an intermediate in a solid-solution series between magnesium-rich tremolite and iron-rich ferro-actinolite, allowing for the exchange of magnesium and iron ions within its crystal lattice.\u003c\/p\u003e\n\u003cp\u003eThis mineral is often found in metamorphic rocks, particularly in contact zones around cooled intrusive igneous formations, and results from the metamorphism of magnesium-rich limestones. Additionally, the term uralite is sometimes used to describe an alteration product of primary pyroxene that predominantly consists of actinolite, commonly found in metamorphosed gabbro or diabase, known as epidiorite.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 40 60 150 \/ CALUMET MINE, CHAFFEE COUNTY, COLORADO, USA \/ 0617A-02","offer_id":52702118445332,"sku":"0617A-02","price":245.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241231_133432.jpg?v=1769221841"},{"product_id":"adamite-limonite-3","title":"ADAMITE ON LIMONITE, MINA OJUELA, MAPIMI, MUN. DE MAPIMI, DURANGO, MEXICO (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eAdamite\u003c\/strong\u003e is a mineral composed of zinc arsenate hydroxide, with the chemical formula Zn2AsO4OH. It is commonly found in the oxidized or weathered areasSeptarian, often referred to as Septarian Nodule or Dragon Stone, is a unique sedimentary rock known for its eye-catching look. This rock is mainly made up of minerals like calcite, aragonite, and limestone, along with other elements such as clay minerals, gypsum, and barite. Its defining feature is the distinctive cracking patterns that create a network of angular designs on its surface, setting it apart from other types of rock.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFound above zinc ore deposits. While pure adamite is colorless, it often appears yellow due to the presence of iron compounds. Additionally, green hues can be observed, which are attributed to copper substitutions within its structure.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 50 70  259 \/ MAPIMI DURANGO MEXICO \/ 46-25","offer_id":49739997872404,"sku":"46-25","price":385.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3476.jpg?v=1769221949"},{"product_id":"aragonite-2-quartz-dolomite-pyrite-crystals-minerals-crystals2collect-rocks","title":"ARAGONITE with QUARTZ, DOLOMITE and PYRITE, CAVNIC, RUMANIA (large cabinet)","description":"\u003cp\u003eA complex and beautiful specimen with thousands of details. Hard to catch on photo.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eAragonite\u003c\/strong\u003e is a carbonate mineral and ranks among the three most prevalent natural crystal forms of calcium carbonate (CaCO3), alongside calcite and vaterite. It is produced through both biological and physical processes, notably through precipitation in marine and freshwater settings.\u003c\/p\u003e\n\u003cp\u003eThe crystal structure of aragonite is distinct from that of calcite, leading to a unique crystal morphology characterized by an orthorhombic system and acicular crystals.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003ePyrite\u003c\/strong\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eQuartz\u003c\/strong\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"130 65 130 \/ CAVNIC, RUMANIA \/ 813-1","offer_id":52702116249876,"sku":"813-1","price":335.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2468_fd58ac8f-2e89-4fb5-9f9a-4f0c027682c7.jpg?v=1771216219"},{"product_id":"artinite-crystals-minerals-crystals2collect-rocks","title":"ARTINITE, SAN BENITO COUNTY, BENITOITE GEM MT DIABLO, CA, USA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eARTINITE\u003c\/strong\u003e is a hydrated basic magnesium carbonate mineral represented by the formula Mg2(CO3)(OH)2·3H2O. This mineral typically forms white, silky monoclinic prismatic crystals, which can appear in radial clusters or as encrustations. With a Mohs hardness of 2.5 and a specific gravity of 2, artinite is relatively soft and lightweight. It is primarily found in low-temperature hydrothermal veins and within serpentinized ultramafic rocks, often occurring alongside minerals such as brucite, hydromagnesite, pyroaurite, chrysotile, aragonite, calcite, dolomite, and magnesite. First identified in 1902 in Lombardy, Italy, it was named in honor of the Italian mineralogist Ettore Artini (1866–1928).\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"30 30 30 6 \/ SAN BENITO COUNTY, BENITOITE GEM MT DIABLO, CA, USA \/ 605-13","offer_id":49739999805716,"sku":"605-13","price":475.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250417_093554.jpg?v=1771216327"},{"product_id":"azurite-1-malachite-crystals-minerals-crystals2collect-rocks","title":"AZURITE with MALACHITE, Yuangchuen, Guangdong, PRC (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eAzurite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e has the chemical formula Cu3(CO3)2(OH)2, with copper(II) cations bonded to both carbonate and hydroxide anions. It is one of two relatively common basic copper(II) carbonate minerals, the other being the bright green malachite. Aurichalcite, on the other hand, is a rare basic carbonate mineral containing copper and zinc. Simple copper carbonate (CuCO3) is not found in nature due to the strong affinity of the Cu2+ ion for the hydroxide anion HO−. \u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eMalachite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e is a mineral composed of copper carbonate hydroxide, represented by the chemical formula Cu2CO3(OH)2. This opaque mineral features distinctive green bands and crystallizes within the monoclinic system. It typically forms in botryoidal, fibrous, or stalagmitic shapes in fractures and subterranean environments, where the presence of hydrothermal fluids and the water table facilitate chemical precipitation. While individual crystals are uncommon, they can appear as slender or acicular prisms, and pseudomorphs resembling more tabular or blocky azurite crystals are also found.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-AU\"\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"49 36 20 59 \/ Yuangchuen, Guangdong, PRC \/ 772-29","offer_id":49740000002324,"sku":"772-29","price":245.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250219_084802.jpg?v=1772791482"},{"product_id":"beryl-1","title":"BERYL VAR AQUAMARINE on QUARTZ, Carnaiba, BRAZIL (LARGE CABINET)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eBeryl\u003c\/b\u003e is a mineral made up of beryllium aluminum silicate, represented by the chemical formula Be3Al2Si6O18. Notable varieties of beryl include emerald and aquamarine. This mineral can form naturally occurring hexagonal crystals that may reach several meters in length, although well-terminated specimens are uncommon. While pure beryl is colorless, it often exhibits various hues due to impurities, including green, blue, yellow, pink, and the rare red. Beryl serves as an important ore for beryllium.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThe crystal on this specimen is about 110 mm x 30 mm. Acquired on 1 July 1988.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"130 100 90  1441 \/ Carnaiba, BRAZIL \/ Jul-27","offer_id":52401694867732,"sku":"Jul-27","price":465.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241227_164654.jpg?v=1772791839"},{"product_id":"brookite-1-crystals-minerals-crystals2collect-rocks","title":"BROOKITE, SINGLE CRYSTAL, MAGNET COVE, ARIZONA, USA (thumbnail)","description":"\u003cp\u003e\u003cstrong\u003eBrookite\u003c\/strong\u003e is an orthorhombic form of titanium dioxide (TiO2) and is one of four recognized natural polymorphs, differing in structure while sharing the same composition. The other three polymorphs are akaogiite (monoclinic), anatase (tetragonal), and rutile (tetragonal). Compared to anatase and rutile, brookite is relatively rare and, like its counterparts, demonstrates photocatalytic properties. It features a larger cell volume, containing eight TiO2 units per cell, in contrast to anatase's four and rutile's two. Common impurities found in brookite include iron (Fe), tantalum (Ta), and niobium (Nb). \u003c\/p\u003e\n\u003cp\u003eThe mineral was named in 1825 by French mineralogist Armand Lévy in honor of Henry James Brooke, an English crystallographer and mineralogist. A specific variety known as arkansite is found in Magnet Cove, Arkansas, and brookite is also located in the Murun Massif on the Olyokma-Chara Plateau in Eastern Siberia, Russia. At temperatures exceeding approximately 750 °C, brookite transforms back into the rutile structure.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"8 6 6 \/ MAGNET COVE, ARIZONA, USA \/ 592-18","offer_id":52702113431828,"sku":"592-18","price":250.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250307_150559.jpg?v=1779189316"},{"product_id":"brookite-2-crystals-minerals-crystals2collect-rocks-pseudobrookite","title":"PSEUDOBROOKITE , THOMAS RANGE, JUAB COUNTY, UTAH, USA (small cabinet) CHECK THE MICROSCOPICAL PICTURES","description":"\u003cp\u003e\u003cstrong\u003ePseudobrookite \u003c\/strong\u003eis a mineral composed of iron titanium oxide, represented by the chemical formula Fe2TiO5 or (Fe3+,Fe2+)2(Ti,Fe2+)O5. It was first identified in 1878 at Uroi Hill (also known as Arany Hill) in Simeria, Hunedoara County, Romania. The name derives from the Greek word for \"false,\" reflecting its deceptive resemblance to brookite. Pseudobrookite typically forms through pneumatolytic processes and alteration within titanium-rich volcanic rocks, including andesite, rhyolite, and basalt, and is often found in association with xenoliths within these volcanic materials. Additionally, it is frequently located in lithophysae.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"65 45 60 175 \/ THOMAS RANGE, JUAB COUNTY, UTAH, USA \/ 585-42","offer_id":49740001673492,"sku":"585-42","price":450.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250531_140038.jpg?v=1779189325"},{"product_id":"brucite-1-crystals-minerals-crystals2collect-rocks","title":"BRUCITE, PHALABORWA, TRANSVAAL, SOUTH AFRICA (thumbnail)","description":"\u003cp\u003e\u003cstrong\u003eBrucite\u003c\/strong\u003e is the mineral variant of magnesium hydroxide, represented by the chemical formula Mg(OH)2. It commonly forms as an alteration product of periclase in marble and serves as a low-temperature hydrothermal vein mineral found in metamorphosed limestones and chlorite schists. Additionally, brucite is produced during the serpentinization process of dunites. This mineral is frequently associated with other minerals such as serpentine, calcite, aragonite, dolomite, magnesite, hydromagnesite, artinite, talc, and chrysotile. Structurally, brucite features a layered arrangement similar to CdI2, with hydrogen bonds connecting the layers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrucite\u003c\/strong\u003e was first identified in 1824 by François Sulpice Beudant and was named in honor of the American mineralogist Archibald Bruce, who lived from 1777 to 1818. A fibrous form of brucite, known as nemalite, appears in elongated fibers or laths, typically aligned along the [1010] direction, though it can also be found in the [1120] crystalline direction.\u003cbr\u003e\u003cbr\u003e2 pieces in this lot. Stand not included.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"20 5 10 \/ PHALABORWA, TRANSVAAL, SOUTH AFRICA \/ 596-18","offer_id":52702113366292,"sku":"596-18","price":285.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250320_161334.jpg?v=1779189373"},{"product_id":"bixbyite-crystals-minerals-crystals2collect-rocks-euhedral-isometric","title":"BIXBYITE (EUHEDRAL ISOMETRIC), THOMAS RANGE, JUAB COUNTY, UTAH, USA MINIATURE","description":"\u003cp\u003e\u003cstrong\u003eBixbyite \u003c\/strong\u003eis a manganese iron oxide mineral represented by the chemical formula (Mn,Fe)2O3. The ratio of iron to manganese can vary significantly, with many samples containing little to no iron. This mineral appears as a metallic dark black and has a Mohs hardness ranging from 6.0 to 6.5. Bixbyite is relatively rare and is prized by collectors for its tendency to form euhedral isometric crystals, which can take the shape of cubes, octahedra, and dodecahedra.\u003c\/p\u003e\n\u003cp\u003eIt is typically found in association with minerals such as beryl, quartz, spessartine, hematite, pseudobrookite, hausmannite, braunite, and topaz within pneumatolytic or hydrothermal veins and cavities, as well as in metamorphic rocks. Additionally, it can occur in lithophysal cavities within rhyolite. Notable locations for bixbyite include the Jhabua and Chhindwara districts in India and the Thomas Range in Juab County, Utah, with occurrences also reported in San Luis Potosi, Mexico; northern Patagonia, Argentina; Girona, Catalonia, Spain; Sweden, Germany, Namibia, Zimbabwe, and South Africa.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"6 6 6 (25 13 8) 5 \/ THOMAS RANGE, JUAB COUNTY, UTAH, USA \/ 273-17","offer_id":52702113300756,"sku":"273-17","price":495.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250227_143615.jpg?v=1779189379"},{"product_id":"cassiterite-1-topaz-muscovite-crystals-minerals-rocks-crystals2collect","title":"CASSITERITE with TOPAZ on MUSCOVITE, PING WU SI CHUAN, SICHUAN PROVINCE, PRC  (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eCassiterite\u003c\/strong\u003e, a mineral composed of tin oxide (SnO2), typically appears opaque but can be translucent in thin crystal forms. Its attractive luster and varied crystal faces make it a sought-after gem. Historically, cassiterite served as the primary source of tin and continues to be a vital tin resource today. Current cassiterite deposits are predominantly located in alluvial or placer environments, where the grains are resistant to weathering. The most significant primary sources are in Bolivia's tin mines, where it occurs in crystallized hydrothermal veins. Meanwhile, Rwanda is developing its cassiterite mining sector. In the eastern Democratic Republic of the Congo, conflicts over cassiterite deposits, especially in Walikale, have arisen, leading to its classification as a conflict mineral. However, this specimen originates from China.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTopaz\u003c\/strong\u003e is a silicate mineral composed of aluminum and fluorine, represented by the chemical formula Al2SiO4(F, OH)2. It is commonly utilized as a gemstone in jewelry and decorative items. While natural topaz is typically colorless, impurities can impart hues ranging from pale blue to golden brown or yellow-orange. Treatments involving heat or radiation can enhance its color to deep blue, reddish-orange, pale green, pink, or purple. \u003c\/p\u003e\n\u003cp\u003eAs a nesosilicate and aluminosilicate mineral, topaz ranks among the hardest naturally occurring minerals and features a low index of refraction. It crystallizes in the orthorhombic system and exhibits a dipyramidal crystal class. Topaz is found in various global locations, with Brazil and Russia being notable sources, and is often extracted through open-pit or alluvial mining methods. \u003c\/p\u003e\n\u003cp\u003eThe term \"topaz\" is thought to originate from the Greek word Τοπάζιος (Topázios) or Τοπάζιον (Topázion), linked to St. John's Island in the Red Sea, where a yellow stone was historically mined. The mineral was first named \"topaz\" in 1737. Ancient Sri Lanka also played a role in the trade of topazes to Greece and Egypt, contributing to the etymology of the name. Some sources suggest a connection to the Sanskrit word तपस् (tapas), meaning \"heat\" or \"fire.\"\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMuscovite,\u003c\/b\u003e commonly referred to as common mica, isinglass, or potash mica, is a hydrated phyllosilicate mineral composed of aluminum and potassium, represented by the chemical formula KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O). This mineral is characterized by its exceptional basal cleavage, allowing it to produce extremely thin and often highly flexible sheets.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 60 40 199 \/ PING WU SI CHUAN, SICHUAN PROVINCE, PRC \/ 905-22","offer_id":49740002492692,"sku":"905-22","price":750.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250116_173849.jpg?v=1779189745"},{"product_id":"chalcopyrite-1-sphalerite-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE, SPHALERITE, QUARTZ,  HUARON, SAN JOSE DE HUAYLLAG DISTR. CERRO DE PASCO, PERU(small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eSphalerite,\u003c\/b\u003e a sulfide mineral represented by the chemical formula (Zn, Fe)S, serves as the primary source of zinc. This mineral occurs in various types of deposits, predominantly in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly associated with minerals such as galena, chalcopyrite, pyrite, as well as calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite \u003c\/b\u003eis a copper iron sulfide mineral and the most abundant copper ore mineral. It possesses the chemical formula CuFeS2 and crystallizes in the tetragonal system. Its appearance ranges from brassy to golden yellow, with a hardness rating of 3.5 to 4 on the Mohs scale. The streak of chalcopyrite is diagnostic, displaying a-tinged black color.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUpon exposure to air, chalcopyrite undergoes tarnishing, resulting in various oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), and digenite (Cu9S5); carbonates such as malachite and azurite; and, less frequently, oxides like cuprite (Cu2O). It is seldom found in association with native copper. Chalcopyrite also serves as a conductor of electricity.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Very rare as the mines are closed for decades. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"75 60 60 234 \/ HUARON, SAN JOSE DE HUAYLLAG DISTR. CERRO DE PASCO, PERU \/ 906-23","offer_id":49740002787604,"sku":"906-23","price":685.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241227_091954.jpg?v=1779189884"},{"product_id":"chalcopyrite-10-pyrite-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE, PYRITE with NEEDLE QUARTZ, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU  SMALL CABINET","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite\u003c\/b\u003e is a mineral composed of copper, iron, and sulfur, recognized as the primary source of copper ore. Its chemical composition is represented by the formula CuFeS2, and it crystallizes within the tetragonal system. The mineral exhibits a brassy to golden yellow hue and possesses a hardness rating of 3.5 to 4 on the Mohs scale, with a distinctive green-tinged black streak.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePyrite\u003c\/b\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Rare specimen as the mines are closed for decades. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"70 41 53 147 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 800-32","offer_id":49740002918676,"sku":"800-32","price":855.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250113_100002.jpg?v=1779189914"},{"product_id":"chalcopyrite-11-pyrite-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE, PYRITE, QUARTZ, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU  (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite \u003c\/b\u003eis a copper iron sulfide mineral and the most abundant copper ore mineral. It possesses the chemical formula CuFeS2 and crystallizes in the tetragonal system. Its appearance ranges from brassy to golden yellow, with a hardness rating of 3.5 to 4 on the Mohs scale. The streak of chalcopyrite is diagnostic, displaying a-tinged black color.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUpon exposure to air, chalcopyrite undergoes tarnishing, resulting in various oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), and digenite (Cu9S5); carbonates such as malachite and azurite; and, less frequently, oxides like cuprite (Cu2O). It is seldom found in association with native copper. Chalcopyrite also serves as a conductor of electricity.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePyrite\u003c\/b\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003ePrivate Peruvian Collection. Very rare as the mines are closed for decades. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"70 50 50 144 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 801-32","offer_id":49740002984212,"sku":"801-32","price":565.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250113_075514.jpg?v=1779189960"},{"product_id":"chalcopyrite-13-pyrite-chalcopyrite-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE, PYRITE, SPHALERITE with QUARTZ, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU  SMALL CABINET","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite \u003c\/b\u003eis a copper iron sulfide mineral and the most abundant copper ore mineral. It possesses the chemical formula CuFeS2 and crystallizes in the tetragonal system. Its appearance ranges from brassy to golden yellow, with a hardness rating of 3.5 to 4 on the Mohs scale. The streak of chalcopyrite is diagnostic, displaying a-tinged black color.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUpon exposure to air, chalcopyrite undergoes tarnishing, resulting in various oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), and digenite (Cu9S5); carbonates such as malachite and azurite; and, less frequently, oxides like cuprite (Cu2O). It is seldom found in association with native copper. Chalcopyrite also serves as a conductor of electricity.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cbr\u003e\u003cb\u003ePyrite\u003c\/b\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSphalerite\u003c\/b\u003e, a sulfide mineral represented by the formula (Zn, Fe)S, serves as the primary source of zinc. This mineral occurs in various types of deposits, predominantly in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly found alongside other minerals such as galena, chalcopyrite, pyrite, and various carbonates and silicates, including calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Very rare as the mines are closed for decades. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 60 55 145 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 803-23","offer_id":49740003049748,"sku":"803-23","price":655.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241226_084958.jpg?v=1779190008"},{"product_id":"chalcopyrite-14-rhodochrosite-sphalerite-quartz-crystals-minerals-rocks-crystals2collect","title":"RHODOCHROSITE, CHALCOPYRITE, QUARTZ, SPHALERITE, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU  CABINET","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite\u003c\/b\u003e is a mineral composed of copper, iron, and sulfur, recognized as the primary source of copper ore. Its chemical composition is represented by the formula CuFeS2, and it crystallizes within the tetragonal system. The mineral exhibits a brassy to golden yellow hue and possesses a hardness rating of 3.5 to 4 on the Mohs scale, with a distinctive green-tinged black streak.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRhodochrosite \u003c\/b\u003eis a manganese carbonate mineral characterized by the chemical formula MnCO3. While it is rarely found in its pure form, it usually exhibits a rose-red hue, though it can also appear in various shades of pink to pale brown. The mineral leaves a white streak and has a Mohs hardness ranging from 3.5 to 4.5. Its specific gravity falls between 3.45 and 3.6. Rhodochrosite crystallizes in the trigonal system and features a structure and cleavage consistent with the carbonate rhombohedral system.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eSphalerite,\u003c\/b\u003e a sulfide mineral represented by the chemical formula (Zn, Fe)S, serves as the primary source of zinc. This mineral occurs in various types of deposits, predominantly in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly associated with minerals such as galena, chalcopyrite, pyrite, as well as calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"73 60 40 186 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 804-23","offer_id":52702111727892,"sku":"804-23","price":645.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241227_092142.jpg?v=1779190040"},{"product_id":"chalcopyrite-3-sphalerite-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE, SPHALERITE, QUARTZ  CABINET, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite \u003c\/b\u003eis a copper iron sulfide mineral and the most abundant copper ore mineral. It possesses the chemical formula CuFeS2 and crystallizes in the tetragonal system. Its appearance ranges from brassy to golden yellow, with a hardness rating of 3.5 to 4 on the Mohs scale. The streak of chalcopyrite is diagnostic, displaying a-tinged black color.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUpon exposure to air, chalcopyrite undergoes tarnishing, resulting in various oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), and digenite (Cu9S5); carbonates such as malachite and azurite; and, less frequently, oxides like cuprite (Cu2O). It is seldom found in association with native copper. Chalcopyrite also serves as a conductor of electricity.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eSphalerite\u003c\/b\u003e, a sulfide mineral represented by the formula (Zn, Fe)S, serves as the primary source of zinc. This mineral occurs in various types of deposits, predominantly in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly found alongside other minerals such as galena, chalcopyrite, pyrite, and various carbonates and silicates, including calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Very rare as the mines are closed for decades. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"95 40 80  383 \/ HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU \/ 653-21","offer_id":52702111596820,"sku":"653-21","price":820.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241230_101924.jpg?v=1779190145"},{"product_id":"chalcopyrite-4-crystals-minerals-rocks-crystals2collect-sphalerite-quartz-manganocalcite","title":"SPHALERITE, CHALCOPYRITE, QUARTZ, MANGANOCALCITE. SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eSphalerite,\u003c\/b\u003e a sulfide mineral represented by the chemical formula (Zn, Fe)S, serves as the principal ore for zinc extraction. This mineral occurs in various types of deposits, predominantly within sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly associated with other minerals such as galena, chalcopyrite, pyrite, as well as calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite\u003c\/b\u003e is a mineral composed of copper, iron, and sulfur, recognized as the primary source of copper ore. Its chemical composition is represented by the formula CuFeS2, and it crystallizes within the tetragonal system. The mineral exhibits a brassy to golden yellow hue and possesses a hardness rating of 3.5 to 4 on the Mohs scale, with a distinctive green-tinged black streak.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection, Very rare as the mines closed decades ago. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"85 52 50 139 \/ HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU \/ 654-41","offer_id":49740003279124,"sku":"654-41","price":750.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250611_162813.jpg?v=1779190167"},{"product_id":"chalcopyrite-6-crystals-minerals-rocks-crystals2collectgoethite-sphalerite","title":"CHALCOPYRITE with GOETHITE and a single SPHALERITE CRYSTAL SMALL CABINET","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eChalcopyrite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e is a mineral composed of copper, iron, and sulfur, recognized as the primary source of copper ore. Its chemical composition is represented by the formula CuFeS2, and it crystallizes within the tetragonal system. The mineral exhibits a brassy to golden yellow hue and possesses a hardness rating of 3.5 to 4 on the Mohs scale, with a distinctive, green-tinged black streak.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGoethite\u003c\/strong\u003e is a mineral belonging to the diaspore group, characterized as iron(III) oxide-hydroxide, specifically in its α-polymorph form. It is commonly found in soil and low-temperature environments, including sedimentary contexts. Historically recognized for its use as a pigment, particularly brown ochre, goethite has been identified in ancient paint samples from the Lascaux caves in France. The mineral was first documented in 1806, based on specimens from the Hollertszug Mine in Herdorf, Germany, and is named in honor of the German polymath Johann Wolfgang von Goethe.\u003c\/p\u003e\n\u003cp\u003eGoethite is composed of iron oxyhydroxide with ferric iron as its primary element. It serves as a significant component of rust and bog iron ore. The mineral exhibits a hardness of 5.0 to 5.5 on the Mohs Scale and has a specific gravity ranging from 3.3 to 4.3. While it typically forms massive structures, goethite can also appear as prismatic needle-like crystals, often referred to as \"needle ironstone.\"\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"62 30 25 89 \/ HUARON, SAN JOSE DE HUAYLLAG DISTR. CERRO DE PASCO, PERU \/ 0781-19","offer_id":49740003377428,"sku":"0781-19","price":575.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250128_132515.jpg?v=1779190178"},{"product_id":"chalcopyrite-7-sphalerite-pyrite-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE, SPHALERITE, PYRITE, QUARTZ  SMALL CABINET","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eSphalerite,\u003c\/b\u003e a sulfide mineral represented by the chemical formula (Zn, Fe)S, serves as the primary source of zinc. This mineral occurs in various types of deposits, predominantly in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly associated with minerals such as galena, chalcopyrite, pyrite, as well as calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePyrite\u003c\/b\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChalcopyrite \u003c\/b\u003eis a copper iron sulfide mineral and the most abundant copper ore mineral. It possesses the chemical formula CuFeS2 and crystallizes in the tetragonal system. Its appearance ranges from brassy to golden yellow, with a hardness rating of 3.5 to 4 on the Mohs scale. The streak of chalcopyrite is diagnostic, displaying a-tinged black color.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUpon exposure to air, chalcopyrite undergoes tarnishing, resulting in various oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), and digenite (Cu9S5); carbonates such as malachite and azurite; and, less frequently, oxides like cuprite (Cu2O). It is seldom found in association with native copper. Chalcopyrite also serves as a conductor of electricity.\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003ePrivate Peruvian Collection. Very rare as the mines are closed for decades. Former Steve Moon Collection.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"72 45 40 120 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 797-23","offer_id":49740003410196,"sku":"797-23","price":595.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241227_081823.jpg?v=1779190194"},{"product_id":"chalcopyrite-9-quartz-crystals-minerals-rocks-crystals2collect","title":"CHALCOPYRITE WITH NEEDLE QUARTZ, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU  SMALL CABINET","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eChalcopyrite\u003c\/strong\u003e is a copper iron sulfide mineral and the most abundant copper ore mineral. It possesses the chemical formula CuFeS2 and crystallizes in the tetragonal system. Its appearance ranges from brassy to golden yellow, with a hardness rating of 3.5 to 4 on the Mohs scale. The streak of chalcopyrite is diagnostic, displaying a-tinged black color.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFrom private Peruvian collection. Very hard to find as the mines are closed for decades.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFormer Steve Moon Collection\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"60 55 50  125 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 799-25","offer_id":49740003508500,"sku":"799-25","price":500.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3495.jpg?v=1779190223"},{"product_id":"chrysocolla-crystals-minerals-rocks-crystals2collect","title":"CHRYSOCOLLA, NEAR PIOCHE LINCOLN COUNTY, NEVADA, USA  MINIATURE","description":"\u003cp\u003e\u003cstrong\u003eChrysocolla\u003c\/strong\u003e is a hydrous copper phyllosilicate mineral and mineraloid characterized by the formula Cu2 – xAlx(H2Si2O5)(OH)4â‹…nH2O (where x \u0026lt; 1) or (Cu, Al)2H2Si2O5(OH)4â‹…nH2O. The mineral's structural composition has been debated, with a 2006 spectrographic study indicating that what is commonly recognized as chrysocolla might actually be a combination of the copper hydroxide spertiniite and chalcedony.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"46 30 28 28 \/ NEAR PIOCHE LINCOLN COUNTY, NEVADA, USA \/ 731-13","offer_id":49740003639572,"sku":"731-13","price":265.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250417_105340.jpg?v=1779190317"},{"product_id":"corundum-crystals-minerals-rocks-crystals2collect-sapphire","title":"CORUNDUM CRYSTAL, INDIA (33 mm)","description":"\u003cp\u003eCorundum is a crystalline variant of aluminum oxide (Al2O3) that often contains small amounts of iron, titanium, vanadium, and chromium. This mineral is significant in rock formation and is naturally transparent, though its color can vary based on the presence of transition metal impurities within its crystal lattice. Corundum is primarily recognized for its two gem varieties: ruby and sapphire. Rubies are characterized by their red hue, attributed to chromium, while sapphires can display a spectrum of colors depending on the specific transition metal involved. A unique type of sapphire known as padparadscha is distinguished by its pink-orange coloration. The term \"corundum\" originates from the Tamil-Dravidian word kurundam, which translates to ruby-sapphire, and is reflected in its Sanskrit form, kuruvinda.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eUnder Long Wave UV the crystal turns red.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"33 20 20 27 \/ INDIA \/ 922-04","offer_id":49740004262164,"sku":"922-04","price":550.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250123_150236.jpg?v=1779190460"},{"product_id":"datolite-2-crystals-minerals-rocks-crystals2collect","title":"DATOLITE POCKET, MILLINGTON QUARRY, MILLINGTON, NEW JERSEY, USA (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eDatolite\u003c\/strong\u003e is classified as a calcium boron hydroxide nesosilicate, with the chemical formula CaBSiO4(OH). It was initially discovered by Jens Esmark in 1806, who derived its name from the Greek words δατεῖσθαι, meaning \"to divide,\" and λίθος, meaning \"stone,\" reflecting the mineral's granular structure.\u003c\/p\u003e\n\u003cp\u003eThis mineral crystallizes in the monoclinic system, resulting in prismatic crystals and nodular formations. It exhibits a vitreous luster and can appear in various colors, including brown, yellow, light green, or colorless. Datolite has a Mohs hardness of 5.5 and a specific gravity ranging from 2.8 to 3.0.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFormer John Betts Collection NY # 12149\u003c\/strong\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"51.5 38.8 34.7  81 \/ MILLINGTON QUARRY, MILLINGTON, NEW JERSEY, USA \/ 184-02","offer_id":49740005015828,"sku":"184-02","price":165.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241231_171356.jpg?v=1779190814"},{"product_id":"fluorite-13-crystals-minerals-rocks-crystals2collect-quartz-calcite","title":"FLUORITE (BI-COLOR, perfect crystals) QUARTZ \u0026 CALCITE, OKARUSO MINE, OTJIWARANGO, OTAVI HIGHLANDS, NAMIBIA (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eFluorite\u003c\/strong\u003e, known as fluorspar, is the mineral variant of calcium fluoride, represented by the formula CaF2. This mineral is classified within the halide group and typically forms in an isometric cubic structure, though octahedral and other intricate isometric shapes can also be found. According to the Mohs scale of mineral hardness, fluorite is assigned a hardness value of 4, determined through scratch resistance comparisons.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"110 70 80 \/ OKARUSO MINE, OTJIWARANGO, OTAVI HIGHLANDS, NAMIBIA \/ 698-5","offer_id":52702106059028,"sku":"698-5","price":850.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2963.jpg?v=1779191070"},{"product_id":"fluorite-2-crystals-minerals-rocks-crystals2collect-scheelite","title":"FLUORITE (BLUE) with SCHEELITE, YAOGANGXIAN MINE, HUNAN, PRC (cabinet)","description":"\u003cp\u003eBLUE FLUORITE, SCHEELITE\u003c\/p\u003e\n\u003cp\u003eFluorite, known as fluorspar, is the mineral variant of calcium fluoride, represented by the formula CaF2. This mineral is classified within the halide group and typically forms in an isometric cubic structure, though octahedral and other intricate isometric shapes can also be found. According to the Mohs scale of mineral hardness, fluorite is assigned a hardness value of 4, determined through scratch resistance comparisons.\u003c\/p\u003e\n\u003cp\u003eScheelite, a mineral composed of calcium tungstate with the formula CaWO4, serves as a significant source of tungsten, also known as wolfram.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"110 70 50 \/ YAOGANGXIAN MINE, HUNAN, PRC \/ 0846A-10","offer_id":52702105862420,"sku":"0846A-10","price":365.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2436.jpg?v=1779191234"},{"product_id":"galena-2-crystals-minerals-rocks-crystals2collect","title":"GALENA with QUARTZ, HUARON, SAN JOSE DE HUAYLLAG DISTR. CERRO DE PASCO, PERU (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eGalena\u003c\/strong\u003e, known as lead glance, is the natural mineral form of lead(II) sulfide (PbS) and serves as the primary ore for lead, as well as a significant source of silver. \u003c\/p\u003e\n\u003cp\u003eThis mineral is among the most prevalent and widely found sulfide minerals, crystallizing in a cubic system and frequently exhibiting octahedral shapes. Galena is commonly found in association with other minerals such as sphalerite, calcite, and fluorite.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Very rare as the mines closed decades ago. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"60 35 50 158 \/ HUARON, SAN JOSE DE HUAYLLAG DISTR. CERRO DE PASCO, PERU \/ 721-23","offer_id":49740010258708,"sku":"721-23","price":295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241226_084844.jpg?v=1779191427"},{"product_id":"grossular-7-crystals-rocks-minerals-crystals2collect-quartz-hematite-garnet-garnets","title":"GROSSULAR GARNETS, QUARTZ, HEMATITE, JEFFREY MINE, ASBESTOS QUEBEC, CANADA (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eGrossular \u003c\/strong\u003eis a calcium-aluminium member of the garnet mineral group, characterized by the chemical formula Ca3Al2(SiO4)3. In its composition, calcium can be partially substituted by ferrous iron, while aluminium may be replaced by ferric iron. The name grossular is derived from the gooseberry, grossularia, reflecting the green variety of this garnet found in Siberia. It also appears in other colors, including cinnamon brown, red, and yellow, and is recognized as a gemstone.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eIn geological contexts, grossular has frequently been referred to as grossularite. However, since 1971, the International Mineralogical Association has advised against the use of the term grossularite for this mineral.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis specimen has at least three other minerals present including quartz, haematite. Definitely some specimen for micro mounts. \u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eHematite\u003c\/b\u003e, alternatively spelled haematite, is a prevalent iron oxide compound represented by the formula Fe2O3, commonly occurring in various rocks and soils. The crystals of hematite are classified within the rhombohedral lattice system, identified as the alpha polymorph of Fe2O3.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"42 80 78 271 \/ JEFFREY MINE, ASBESTOS QUEBEC, CANADA \/ 653-22","offer_id":49740011471124,"sku":"653-22","price":250.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250116_162636.jpg?v=1779191864"},{"product_id":"hausmannite-crystals-rocks-minerals-crystals2collect","title":"HAUSMANNITE, Wessels mine Kalahari Manganese Fields Northern Cape fields South-Africa (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eHausmannite\u003c\/strong\u003e is a rare, complex, mixed oxide of manganese, comprising both divalent and trivalent manganese. Its chemical formula is expressed as MnIIMnIII2O4, which can also be simplified to MnO·Mn2O3 or Mn3O4, similar to the notation used for magnetite (Fe3O4), an iron oxide. This mineral is classified within the spinel group and crystallizes in a tetragonal structure. Hausmannite appears as a brown to black metallic mineral, exhibiting a Mohs hardness of 5.5 and a specific gravity of 4.8.\u003cbr\u003e\u003cbr\u003eThis specimen is an explorer specimen as it contains several other minerals, like quartz, calcite, pyrite. \u003cspan\u003ePyrolusite and Psilomelane could be on this specimen, but needs confirmation.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 80 60 \/ Wessels mine Kalahari Manganese Fields Northern Cape fields South-Africa \/ 954-12","offer_id":52702102749460,"sku":"954-12","price":385.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2680_dfb81c74-cb22-49df-82ce-cf9ef5dfc515.jpg?v=1779191971"},{"product_id":"hematite-3-botryoidal-haematite-crystals-rocks-minerals-crystals2collect","title":"HEMATITE Botryoidal, MOUNT COBALT MINE QUEENSLAND AUSTRALIA (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eHematite\u003c\/strong\u003e, alternatively spelled haematite, is a prevalent iron oxide compound represented by the formula Fe2O3, commonly occurring in various rocks and soils. The crystals of hematite are classified within the rhombohedral lattice system, identified as the alpha polymorph of Fe2O3.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"95 90 60 \/ MOUNT COBALT MINE QUEENSLAND AUSTRALIA \/ 960-5","offer_id":52702102421780,"sku":"960-5","price":185.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2791.jpg?v=1779192073"},{"product_id":"hematite-2","title":"HEMATITE CRYSTAL, WESSELS MINE, KURUMAN, SOUTH-AFRICA (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eHematite\u003c\/b\u003e, alternatively spelled haematite, is a prevalent iron oxide compound represented by the formula Fe2O3, commonly occurring in various rocks and soils. The crystals of hematite are classified within the rhombohedral lattice system, identified as the alpha polymorph of Fe2O3.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"25 20 20 14 \/ WESSELS MINE, KURUMAN, SOUTH-AFRICA \/ 879-40","offer_id":49740012093716,"sku":"879-40","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250613_161826.jpg?v=1779192084"},{"product_id":"howlite-crystals-rocks-minerals-crystals2collect-dolomite","title":"HOWLITE CRYSTALS (extremely rare) on DOLOMITE, NOVA SCOTIA, BRETON, IONA CAPE, CANADA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eHowlite\u003c\/strong\u003e, a mineral composed of calcium borosilicate hydroxide (Ca2B5SiO9(OH)5), is classified as a borate and is typically found in evaporite deposits. \u003c\/p\u003e\n\u003cp\u003eThe mineral was first identified in 1868 by Canadian chemist and geologist Henry How near Windsor, Nova Scotia. Miners in a gypsum quarry initially regarded it as a nuisance, prompting How to investigate further. He initially named it silico-boro-calcite, but it was later renamed howlite by American geologist James Dwight Dana. \u003c\/p\u003e\n\u003cp\u003eGeologically, howlite is most commonly found in irregular nodules that can resemble cauliflower. While crystals of howlite are extremely rare, they have been discovered in a few locations, including Tick Canyon in California and Iona in Nova Scotia, with maximum crystal sizes reaching about one centimeter. The nodules are typically white, featuring fine grey or black veins in a chaotic, web-like pattern, and exhibit an opaque quality with a sub-vitreous luster. In contrast, the crystals from Iona can be colorless, white, or brown, often displaying translucence or transparency. Howlite has a monoclinic structure, a Mohs hardness of 3.5, and lacks regular cleavage, with prismatic crystals that are flattened on the {100} plane. Crystals from Tick Canyon are elongated along the 010 axis, while those from Iona extend along the 001 axis.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"48 41 18 34 \/ NOVA SCOTIA, BRETON, IONA CAPE, CANADA \/ 331-29","offer_id":49740012486932,"sku":"331-29","price":385.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250412_144738.jpg?v=1779192260"},{"product_id":"hubnerite-crystals-rocks-minerals-crystals2collect","title":"HÜBNERITE, Slaskov, Czech Republic (miniature)","description":"\u003cp\u003e\u003cstrong\u003eHübnerite\u003c\/strong\u003e, a mineral composed of manganese tungsten oxide (MnWO4), represents the manganese endmember of the manganese–iron wolframite solid solution series. This mineral typically manifests as reddish-brown to black monoclinic prismatic crystals with a submetallic luster, often exhibiting flattened forms and fine striations. With a specific gravity of 7.15 and a Mohs hardness of 4.5, it is characterized by its transparency to translucency and perfect cleavage.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"40 30 40 46 \/ Slaskov, Czech Republic \/ 950-08","offer_id":49740012519700,"sku":"950-08","price":275.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2451.jpg?v=1779192283"},{"product_id":"kyanite-2-quartz-crystals-rocks-minerals-crystals2collect","title":"KYANITE ON QUARTZ, Rio Grande Do Norte, BRAZIL (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eKyanite\u003c\/strong\u003e is a blue aluminosilicate mineral commonly found in aluminium-rich metamorphic pegmatites and sedimentary formations. It serves as the high-pressure polymorph of andalusite and sillimanite, with its presence in metamorphic rocks typically signifying deep metamorphism within the Earth's crust. Also referred to as disthene or cyanite, kyanite exhibits strong anisotropy, meaning its hardness varies based on crystallographic direction, which is a key identifying feature alongside its distinctive blue hue. The name kyanite is derived from the Ancient Greek word κύανος, which translates to \"dark blue.\"\u003cbr\u003e\u003cbr\u003eTHIS MINERAL SHOULD BE HANDLED WITH CARE. \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"90 30 50 \/ Rio Grande Do Norte BRAZIL \/ 0220A-12","offer_id":52702099865876,"sku":"0220A-12","price":185.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2649_13bc0d54-3874-441a-90ac-a1aa2867954c.jpg?v=1779192482"},{"product_id":"lepidocrocite-2-quartz-crystals-rocks-minerals-crystals2collect-esmeraldite-hydrohematite","title":"LEPIDOCROCITE on QUARTZ, ANDRANONONDAMBO, MADAGASCAR (miniature)","description":"\u003cp\u003e\u003cstrong\u003eLepidocrocite\u003c\/strong\u003e (γ-FeO(OH)), known as esmeraldite or hydrohematite, is a mineral classified as an iron oxide-hydroxide. It features an orthorhombic crystal structure, a hardness rating of 5, and a specific gravity of 4, exhibiting a submetallic luster with a yellow-brown streak. This mineral appears red to reddish-brown and typically forms from the rusting of iron-rich materials submerged in water. Lepidocrocite is frequently associated with the weathering of primary iron minerals and is found in iron ore deposits, often visible as rust scale within aging steel water pipes and tanks.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"51 28 35 35 \/ ANDRANONONDAMBO, MADAGASCAR \/ 618-04","offer_id":49750879404308,"sku":"618-04","price":67.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250123_085240.jpg?v=1779192524"},{"product_id":"magnetite-1-crystals-rocks-minerals-crystals2collect","title":"MAGNETITE, ALP RESCHUNA GRAUBUENDEN SWITZERLAND (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eMagnetite\u003c\/strong\u003e is a significant mineral and a primary source of iron, represented by the chemical formula Fe2+Fe3+2O4. As an iron oxide, it exhibits ferrimagnetic properties, allowing it to be attracted to magnets and capable of being magnetized into a permanent magnet. Aside from exceptionally rare native iron deposits, magnetite is the most magnetic naturally occurring mineral on Earth. Naturally magnetized fragments of magnetite, known as lodestone, can attract small iron objects, which led to the early discovery of magnetism by ancient civilizations. \u003c\/p\u003e\n\u003cp\u003eThis mineral typically appears black or brownish-black with a metallic sheen, possesses a Mohs hardness of 5 to 6, and produces a black streak. Small magnetite grains are frequently found in both igneous and metamorphic rock formations.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 35 60  343 \/ ALP RESCHUNA GRAUBUENDEN SWITZERLAND \/ 810-07","offer_id":49740014223636,"sku":"810-07","price":270.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250213_163116.jpg?v=1779192578"},{"product_id":"magnetite-2-crystals-rocks-minerals-crystals2collect","title":"MAGNETITE with CALCITE, KOVDOR. KOLA, RUSSIA (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eMagnetite\u003c\/strong\u003e is a significant iron ore mineral characterized by the chemical formula Fe2+Fe3+2O4. As one of the iron oxides, it exhibits ferrimagnetic properties, meaning it is attracted to magnets and can be magnetized to form a permanent magnet. Aside from extremely rare native iron deposits, magnetite is the most magnetic naturally occurring mineral on Earth. Naturally magnetized fragments of magnetite, known as lodestone, were instrumental in the early discovery of magnetism by ancient civilizations, as they could attract small iron objects. This mineral typically appears black or brownish-black, possesses a metallic sheen, has a Mohs hardness ranging from 5 to 6, and produces a black streak when scratched.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"63 40 45 179 \/ KOVDOR. KOLA, RUSSIA \/ 695-16","offer_id":49740014256404,"sku":"695-16","price":225.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250112_165019.jpg?v=1779192618"},{"product_id":"malachite-4-crystals-rocks-minerals-crystals2collect-chrysocolla","title":"MALACHITE WITH CHRYSOCOLLA, LIKASI SHABA, CONGO (cabinet)","description":"\u003cp\u003e\u003cbr\u003eThis specimen is from my personal collection and rare to get as the mine closed decades ago.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eMalachite\u003c\/strong\u003e is a mineral composed of copper carbonate hydroxide, represented by the chemical formula Cu2CO3(OH)2. This opaque mineral features distinctive green bands and crystallizes within the monoclinic system. It typically forms in botryoidal, fibrous, or stalagmitic shapes in fractures and subterranean environments, where the presence of hydrothermal fluids and the water table facilitate chemical precipitation. While individual crystals are uncommon, they can appear as slender or acicular prisms, and pseudomorphs resembling more tabular or blocky azurite crystals are also found.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eChrysocolla\u003c\/strong\u003e is a hydrous copper phyllosilicate mineral and mineraloid characterized by the formula Cu2 – xAlx(H2Si2O5)(OH)4â‹…nH2O (where x \u0026lt; 1) or (Cu, Al)2H2Si2O5(OH)4â‹…nH2O. The mineral's structural composition has been debated, with a 2006 spectrographic study indicating that what is commonly recognized as chrysocolla might actually be a combination of the copper hydroxide spertiniite and chalcedony.\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 60 80 \/ LIKASI SHABA, CONGO \/ 615-5","offer_id":52702099308820,"sku":"615-5","price":425.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2497.jpg?v=1779192703"},{"product_id":"malachite-5-crystals-rocks-minerals-crystals2collect-chrysocolla","title":"MALACHITE, BISBEE, COCHISE COUNTY, ARIZONA, USA (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMalachite\u003c\/b\u003e is a mineral composed of copper carbonate hydroxide, represented by the chemical formula Cu2CO3(OH)2. This opaque mineral features distinctive green bands and crystallizes within the monoclinic system. It typically forms in botryoidal, fibrous, or stalagmitic shapes in fractures and subterranean environments, where the presence of hydrothermal fluids and the water table facilitate chemical precipitation. While individual crystals are uncommon, they can appear as slender or acicular prisms, and pseudomorphs resembling more tabular or blocky azurite crystals are also found.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"90 38 70 217 \/ BISBEE, COCHISE COUNTY, ARIZONA, USA \/ 223-42","offer_id":49740014453012,"sku":"223-42","price":325.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250530_191320.jpg?v=1779192720"},{"product_id":"malachite-6-crystals-rocks-minerals-crystals2collect-chrysocolla","title":"MALACHITE, BISBEE, COCHISE COUNTY, ARIZONA, USA (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eMalachite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e is a mineral composed of copper carbonate hydroxide, represented by the chemical formula Cu2CO3(OH)2. This opaque mineral features distinctive green bands and crystallizes within the monoclinic system. It typically forms in botryoidal, fibrous, or stalagmitic shapes in fractures and subterranean environments, where the presence of hydrothermal fluids and the water table facilitate chemical precipitation. While individual crystals are uncommon, they can appear as slender or acicular prisms, and pseudomorphs resembling more tabular or blocky azurite crystals are also found.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"60 52 35 81 \/ BISBEE, COCHISE COUNTY, ARIZONA, USA \/ 1949-04","offer_id":49740014518548,"sku":"1949-04","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250123_145952.jpg?v=1779192809"},{"product_id":"mimetite-12-crystals-rocks-minerals-crystals2collect","title":"MIMETITE, MINERALES MEXICANOS MINE, LEVEL 14, SANTA EULALIA, CHIHUAHUA, MEXICO (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMimetite\u003c\/b\u003e is a mineral composed of lead arsenate chloride (Pb5(AsO4)3Cl) that typically forms as a secondary mineral in lead deposits through the oxidation of galena and arsenopyrite. Its name is derived from the Greek word Μιμητής mimetes, which translates to \"imitator,\" highlighting its similarity to the mineral pyromorphite. This similarity is significant, as mimetite is part of a mineral series that includes both pyromorphite (Pb5(PO4)3Cl) and vanadinite (Pb5(VO4)3Cl). Noteworthy locations for mimetite include Mapimi in Durango, Mexico, and Tsumeb in Namibia.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"83 35 68 158 \/ MINERALES MEXICANOS MINE, LEVEL 14, SANTA EULALIA, CHIHUAHUA, MEXICO \/ 775-41","offer_id":49740014911764,"sku":"775-41","price":495.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250611_154327.jpg?v=1779192896"},{"product_id":"mimetite-8-crystals-rocks-minerals-crystals2collect","title":"MIMETITE, MINERALES MEXICANOS MINE, LEVEL 14, SANTA EULALIA, CHIHUAHUA, MEXICO (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMimetite\u003c\/b\u003e is a mineral composed of lead arsenate chloride (Pb5(AsO4)3Cl) that typically forms as a secondary mineral in lead deposits through the oxidation of galena and arsenopyrite. Its name is derived from the Greek word Μιμητής mimetes, which translates to \"imitator,\" highlighting its similarity to the mineral pyromorphite. This similarity is significant, as mimetite is part of a mineral series that includes both pyromorphite (Pb5(PO4)3Cl) and vanadinite (Pb5(VO4)3Cl). Noteworthy locations for mimetite include Mapimi in Durango, Mexico, and Tsumeb in Namibia.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"85 40 70 140 \/ MINERALES MEXICANOS MINE, LEVEL 14, SANTA EULALIA, CHIHUAHUA, MEXICO \/ 765-23","offer_id":49740015436052,"sku":"765-23","price":315.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241227_133401.jpg?v=1779193042"},{"product_id":"poldervaartite-crystals-rocks-minerals-crystals2collect-olmiite","title":"POLDERVAARTITE now OLMIITE, KALAHARI MANGANESE FIELDS, KURUMAN, SOUTH-AFRICA (miniature)","description":"\u003cp\u003e\u003cstrong\u003ePoldervaartite, \u003c\/strong\u003erenamed OLMIITE,  is an exceptionally rare mineral first identified in 1992 at the Wessels Mine located in the Kalahari manganese fields of Northern Cape Province, South Africa. Its chemical composition is represented by the formula (CaMn2+)2(SiO3OH)(OH), classifying it as a Calcium Manganese Silicate Hydroxide, with a molecular weight of 197.68 grams. To date, the Wessels Mine and the nearby N'Chwaning Mine remain the sole known sources of this mineral. Poldervaartite exhibits a specific gravity of 2.91 g\/cm³ and a refractive index ranging from 1.634 to 1.656, categorized as Biaxial (+). Due to the majority of its crystals being unsuitable for faceting, it is considered a very rare gem, displaying colors that vary from colorless to a light orangish-pink.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"48 20 41 37 \/ KALAHARI MANGANESE FIELDS, KURUMAN, SOUTH-AFRICA \/ 269-13","offer_id":49740016910612,"sku":"269-13","price":450.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250417_105310.jpg?v=1779193399"},{"product_id":"pyrite-7-crystals-rocks-minerals-crystals2collect-quartz-crystals-rocks-minerals-crystals2collect","title":"PYRITE on QUARTZ, LLALLAGUA, BOLIVIA (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003ePyrite\u003c\/strong\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eQuartz \u003c\/strong\u003eis a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"90 87 41 \/ LLALLAGUA, BOLIVIA \/ 947-5","offer_id":52702095081748,"sku":"947-5","price":168.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2490_3d0d7660-f255-4efe-981d-2b3d5307be4d.jpg?v=1779193462"},{"product_id":"pyrite-3-crystals-rocks-minerals-crystals2collect-galena-quartz","title":"PYRITE, GALENA, QUARTZ, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV PERU (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePyrite\u003c\/b\u003e, commonly referred to as fool's gold, is an iron sulphide with the chemical formula FeS2, also known as iron (II) disulphide. It is the most prevalent sulphide mineral found in nature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGalena, \u003c\/strong\u003eknown as lead glance, is the natural mineral variant of lead(II) sulphide (PbS) and serves as the primary ore for lead, as well as a significant source of silver. \u003c\/p\u003e\n\u003cp\u003eThis mineral is among the most prevalent and widely found sulphide minerals, crystallizing in the cubic system and frequently exhibiting octahedral shapes. Galena is commonly found in association with other minerals such as sphalerite, calcite, and fluorite.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Very rare as the mines closed decades ago. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80.2 60.7 24.9  126 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV PERU \/ 1715-02","offer_id":49740017238292,"sku":"1715-02","price":825.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241231_182617.jpg?v=1779193613"},{"product_id":"pyrite-5-quartz-sphalerite-manganocalcite-manganoan-crystals-rocks-minerals-crystals2collect","title":"PYRITE, QUARTZ, MANGANOCALCITE, SPHALERITE, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eSphalerite\u003c\/b\u003e, a sulfide mineral represented by the formula (Zn, Fe)S, serves as the primary source of zinc. This mineral occurs in various types of deposits, predominantly in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide formations. It is commonly found alongside other minerals such as galena, chalcopyrite, pyrite, and various carbonates and silicates, including calcite, dolomite, quartz, rhodochrosite, and fluorite.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePyrite\u003c\/b\u003e, commonly referred to as fool's gold, is an iron sulfide with the chemical formula FeS2, also known as iron (II) disulfide. It is the most prevalent sulfide mineral found in nature.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eManganoan calcite\u003c\/b\u003e, also known as manganocalcite, is a manganese-rich variety of calcite that exhibits a pink hue. Its chemical composition is represented by the formula (Ca,Mn)CO3. Initially identified in the Banská Å tiavnica Mining District of the Slovak Republic, this mineral is found globally, with notable occurrences in the Cave of Swords in Naica, Chihuahua, Mexico, and in Bulgaria.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThere is often confusion between manganoan calcite and rhodochrosite due to their similarities. The manganese content in manganoan calcite can vary by location, and it exists in a solid solution series with calcite and rhodochrosite, resulting in a deeper red color as the manganese concentration increases.\u003cbr\u003e\u003cbr\u003ePrivate Peruvian Collection. Very rare as the mines closed decades ago. Former Steve Moon Collection.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 50 50  121 \/ SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO PROV, PERU \/ 808-16","offer_id":49740017303828,"sku":"808-16","price":485.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250112_182846.jpg?v=1779193665"},{"product_id":"pyromorphite-1-galena-quartz-crystals-rocks-minerals-crystals2collect","title":"PYROMORPHITE, GALENA and QUARTZ, PCHELOYAD MINE, MOMCHILGRAD, KARDZHALI, BULGARIA (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003ePyromorphite\u003c\/strong\u003e is a mineral consisting of lead chlorophosphate, represented by the formula Pb5(PO4)3Cl, and can be found in sufficient quantities to be extracted as a lead ore. It typically forms crystals that exhibit a hexagonal prism shape, often capped with basal planes and occasionally featuring narrow hexagonal pyramid faces. Barrel-shaped crystals are also relatively common, along with globular and reniform aggregates. As a member of the apatite mineral group, pyromorphite closely resembles mimetite (Pb5(AsO4)3Cl) and vanadinite (Pb5(VO4)3Cl) in both physical and chemical properties, making it challenging to differentiate among them without chemical analysis.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eGalena, also known as lead glance, is the natural mineral form of lead(II sulfide (PbS). It serves as the primary ore of lead and is a significant source of silver.\u003c\/p\u003e\n\u003cp\u003eGalena is one of the most and widely distributed sulfide minerals. It crystall in the cubic crystal system, frequently exhibiting octahedral forms. It is commonly found in association with the minerals sphalerite, calcite, and fluorite.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eMINIATURE - MINIATURE - MINIATURE\u003c\/strong\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 45 25  44 \/ PCHELOYAD MINE, MOMCHILGRAD, KARDZHALI, BULGARIA \/ 872-29","offer_id":49740017434900,"sku":"872-29","price":465.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3564.jpg?v=1779193826"},{"product_id":"quartz-1-crystals-rocks-minerals-crystals2collect","title":"QUARTZ, MINAS GERAIS, BRAZIL (large cabinet, clear crystals)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eQuartz\u003c\/strong\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"150 100 100 \/ MINAS GERAIS BRAZIL \/ 834-1","offer_id":52702094655764,"sku":"834","price":285.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2770_accdd0df-129b-49ff-90b8-722585c1276f.jpg?v=1779193999"},{"product_id":"quartz-10-crystals-rocks-minerals-crystals2collect","title":"QUARTZ, GRIMSEL, SWITZERLAND (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eQuartz \u003c\/strong\u003eis a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 80 50  134 \/ GRIMSEL, SWITZERLAND \/ 943-06","offer_id":49740017664276,"sku":"943","price":159.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250113_171823.jpg?v=1779194009"},{"product_id":"quartz-11-calcite-crystals-rocks-minerals-crystals2collect","title":"QUARTZ with CALCITE, PIZ BEVERIN, SWITZERLAND (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQuartz\u003c\/b\u003e is a robust crystalline mineral made up of silica, or silicon dioxide. Its structure consists of a continuous arrangement of SiO4 silicon-oxygen tetrahedra, where each oxygen atom is shared between two tetrahedra, resulting in the chemical formula SiO2. This classification places quartz as a framework silicate mineral in terms of structure and as an oxide mineral in terms of composition. It ranks as the second most prevalent mineral in the continental crust of Earth, following feldspar.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eCalcite \u003c\/b\u003eis a carbonate mineral and the most stable form of calcium carbonate (CaCO3). It is widely found, especially as a key element in limestone. With a hardness rating of 3 on the Mohs scale, calcite is assessed based on its ability to be scratched. Large crystals of calcite are utilized in optical devices, while limestone, primarily made up of calcite, serves a variety of purposes.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"110 40 60  225 \/ PIZ BEVERIN, SWITZERLAND \/ 944-27","offer_id":49740017697044,"sku":"944-27","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3646.jpg?v=1779194021"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/collections\/MIN_3051_1a12b08f-c19d-4745-8b03-f092ab0d4932.jpg?v=1780545735","url":"https:\/\/crystals2collect.com\/collections\/oxides.oembed?page=12","provider":"Crystals2Collect ","version":"1.0","type":"link"}