{"title":"CARBONATES, NITRATES, BORATES","description":"\u003cp\u003eCarbonate minerals feature the anionic complex (CO3)2–, which has a triangular shape with a carbon atom in the middle and an oxygen atom at each corner of the triangle. These anionic groups are tightly bonded units that don’t share oxygen atoms among themselves. The triangular carbonate groups serve as the fundamental building blocks of all carbonate minerals and play a key role in defining the unique properties of this mineral class.\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":"sphalerite-calcite-2-crystals-minerals-crystals2collect-rocks","title":"CALCITE ON SPHALERITE, ELMWOOD MINE TENNESSEE USA (CABINET)","description":"\u003cp class=\"MsoNormal\"\u003eSphalerite, 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.\u003cbr\u003e\u003cbr\u003eCalcite is 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 \u003cp\u003eThis specimen has also miniature crystals and thousands of tiny calcite or dolomite crystals (white), and the matrix is a sulfide.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"115 70 100   672","offer_id":49739999281428,"sku":"115 70 100   672","price":285.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3364.jpg?v=1771215974"},{"product_id":"apophillite-2-crystals-minerals-crystals2collect-rocks","title":"APOPHYLLITE (4 cm large single crystal) on ARAGONITE, POONA, INDIA (cabinet)","description":"\u003cp\u003eApophyllite designates a specific group of phyllosilicates, which are a category of minerals. Initially, this term referred to a single mineral but was redefined in 1978 to encompass a class of minerals with similar chemical compositions that form a solid solution series, including fluorapophyllite-(K), fluorapophyllite-(Na), and hydroxyapophyllite-(K). The term apophyllite is derived from the Greek word apophyllízo (ἀποφυλλίζω), meaning 'it flakes off,' highlighting the tendency of these minerals to disintegrate upon heating due to water loss. Exfoliation can also occur through acid treatment or simple abrasion. These minerals are commonly found as secondary formations within vesicles of basalt or other volcanic rocks.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"110 105 75 595","offer_id":52538313507092,"sku":"110 105 75 595","price":160.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2541.jpg?v=1771216143"},{"product_id":"aragonite-086-07","title":"ARAGONITE, MOROCCO (cabinet)","description":"\u003cp class=\"MsoNormal\"\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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"90 71 70  432","offer_id":49739999576340,"sku":"90 71 70  432","price":225.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250213_135814.jpg?v=1771216162"},{"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 \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 \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 \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 65 130 908","offer_id":52538312229140,"sku":"130 65 130 908","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","offer_id":49739999805716,"sku":"30 30 30 6","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 \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","offer_id":49740000002324,"sku":"49 36 20 59","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":"azurite-2-malachite-crystals-minerals-crystals2collect-rocks","title":"AZURITE ROSE, ZAIRE (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eAzurite\u003c\/strong\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−.\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003eThis specimen exhibits a significantly darker coloration (ed to emphasize its structure).\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"60 50 50  324","offer_id":49740000035092,"sku":"60 50 50  324","price":375.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3474.jpg?v=1772791506"},{"product_id":"azurite-3-malachite-crystals-minerals-crystals2collect-rocks","title":"AZURITE NAMIBIA (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eAzurite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e, also referred to as Azure spar, is a soft, vibrant blue copper mineral formed through the weathering of copper ore deposits. In the early 19th century, it was commonly called chessylite, named after its type locality in Chessy-les-Mines, near Lyon, France. This mineral, characterized by the basic carbonate formula Cu3(CO3)2(OH)2, has a long history, having been noted in ancient texts such as Pliny the Elder's Natural History, where it was identified by the Greek term kuanos, meaning \"deep blue,\" and the Latin term caeruleum. The blue hue of azurite is attributed to the presence of copper ions.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"59 34 46  99","offer_id":49740000067860,"sku":"59 34 46  99","price":195.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250128_131704.jpg?v=1772791527"},{"product_id":"azurite-5-limonite-crystals-minerals-crystals2collect-rocks-malachite-crystals-minerals-crystals2collect-rocks","title":"AZURITE on LIMONITE, MORENCI, GREENLEE COUNTY, ARIZONA, USA (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eAzurite\u003c\/strong\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−.\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eLimonite\u003c\/strong\u003e is an iron ore made up of a blend of hydrated iron(III) oxide-hydroxides with varying compositions. While it is often represented by the formula FeO(OH)·nH2O, this depiction is misleading since the proportions of oxide to hydroxide can differ significantly.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 70 70  232","offer_id":49740000133396,"sku":"80 70 70  232","price":359.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3488.jpg?v=1772791569"},{"product_id":"barite-2-baryte-calcite-sphalerite-crystals-minerals-crystals2collect-rocks","title":"BARYTE,  CALCITE and SPHALERITE, MOROCCO (LARGE CABINET)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eBaryte,\u003c\/b\u003e also known as barite or barytes, is a mineral composed of barium sulfate (BaSO4). Typically appearing white or colorless, barite serves as the primary source of barium. The baryte group includes barite, celestine (strontium sulfate), anglesite (lead sulfate), and anhydrite (calcium sulfate), with barite and celestine forming a solid solution represented as (Ba,Sr)SO4.\u003cbr\u003e\u003cb\u003e\u003cbr\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.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \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. This calcite turns yellow in long wave UV.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"125 100 90 1184","offer_id":49740000231700,"sku":"125 100 90 1184","price":1135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250110_120007.jpg?v=1772791664"},{"product_id":"calcite-11-crystals-minerals-crystals2collect-rocks","title":"CALCITE (DOG TOOTH), BECKE-OESE, GERMANY, TRANSPARANT (large cabinet)","description":"\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":"140 125 60 716","offer_id":49740259688724,"sku":"140 125 60 716","price":315.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241230_115524.jpg?v=1779189398"},{"product_id":"calcite-12-crystals-minerals-crystals2collect-rocks-pyrite","title":"CALCITE with PYRITE, FRENCH ALPS, FRANCE (small 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.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCalcite\u003c\/strong\u003e is 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":"65 55 25 76","offer_id":49740001968404,"sku":"65 55 25 76","price":95.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2712.jpg?v=1779189422"},{"product_id":"calcite-13-crystals-minerals-crystals2collect-rocks-chalcopyrite","title":"CALCITE with CHALCOPYRITE (cabinet)","description":"\u003cp\u003ecovered with chalcopyrite and or hematite.\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eCalcite is 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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"125 90 50","offer_id":49740002001172,"sku":"125 90 50","price":275.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2826.jpg?v=1779189442"},{"product_id":"calcite-1-crystals-minerals-crystals2collect-rocks","title":"CALCITE, Holzen, GERMANY (LARGE CABINET)","description":"\u003cp\u003e\u003cstrong\u003ePhantom\u003c\/strong\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003eCalcite is 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":"130 60 70 501","offer_id":52538272842004,"sku":"130 60 70 501","price":405.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3638.jpg?v=1779189488"},{"product_id":"calcite-10-crystals-minerals-crystals2collect-rocks","title":"CALCITE (SNOWWHITE), BATOPILAS DISTRICT CHIHUAHUA MEXICO (small cabinet)","description":"\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 \u003cp class=\"MsoNormal\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"78 40 60 100","offer_id":49740002066708,"sku":"78 40 60 100","price":285.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250531_113350.jpg?v=1779189500"},{"product_id":"calcite-3-crystals-minerals-crystals2collect-rocks","title":"CALCITE, Guizhou PRC (large cabinet)","description":"\u003cp\u003eCalcite is 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 \u003cp\u003eThis specimen has a great cluster of dog tooth crystals and a matrix containing malachite.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"150 80 130 828","offer_id":52538272579860,"sku":"150 80 130 828","price":425.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2765.jpg?v=1779189512"},{"product_id":"calcite-5-dog_tooth-crystals-minerals-crystals2collect-rocks","title":"CALCITE (PINK DOG TOOTH), Hubei, PRC (small cabinet)","description":"\u003cp\u003eDog tooth accompanied by malachite.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003eCalcite is 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":"80 70 63 253","offer_id":52538272481556,"sku":"80 70 63 253","price":225.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2796.jpg?v=1779189528"},{"product_id":"calcite-6-manganocalcite-manganoan-crystals-minerals-crystals2collect-rocks-double_spate","title":"CALCITE with MANGANO CALCITE, PRC (cabinet)","description":"\u003cp\u003eDOUBLE SPATE\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003eCalcite is 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 90 90 501","offer_id":52538272350484,"sku":"110 90 90 501","price":125.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3029.jpg?v=1779189565"},{"product_id":"calcite-7","title":"HEULANDITE (GREEN), AURANGABAD INDIA (cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eHeulandite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e refers to a series of tecto-silicate minerals within the zeolite group. Originally classified as a distinct mineral species until 1997, it was redefined by the International Mineralogical Association to encompass a series, with specific species identified as Heulandite-Ca, Heulandite-Na, Heulandite-K, Heulandite-Sr, and Heulandite-Ba (the latter described in 2002). Heulandite-Ca, the most prevalent variant, is a hydrous calcium and aluminum silicate represented by the formula (Ca,Na)2−3Al3(Al,Si)2Si13O36·12H2O. Typically, small quantities of sodium and potassium substitute for calcium, while strontium replaces calcium in the heulandite-Sr variant. The designation of the species is based on the predominant element, although they are visually indistinguishable, and the term heulandite is still applied in cases where specific testing has not been conducted.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"120 82 80  338","offer_id":49740002328852,"sku":"120 82 80  338","price":685.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3209.jpg?v=1779189587"},{"product_id":"calcite-8-crystals-minerals-rocks-crystals2collect","title":"CALCITE - BROWN, CERA DEL MERCADO, DURANGO, MEXICO  (cabinet)","description":"\u003cp\u003eBROWN CALCITE\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003eCalcite is 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 \u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e638 grams\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"120 110 70 300","offer_id":52538272284948,"sku":"120 110 70 300","price":195.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3108.jpg?v=1779189625"},{"product_id":"chabazite-1-calcite-crystals-minerals-rocks-crystals2collect","title":"CHABAZITE with CALCITE (plus a green, so far unidentified, mineral (needles) Bingham, Hansonburg District, Sorocco Co, New Mexico |  Blanchard Mine (Portalas-Blanchard Mine), USA (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eChabazite\u003c\/strong\u003e is a tectosilicate mineral belonging to the zeolite group, closely associated with gmelinite, and has the chemical formula (Ca,K2,Na2,Mg)Al2Si4O12•6H2O. Varieties are classified as Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, based on the dominant cation present.\u003c\/p\u003e \u003cp\u003eThis mineral crystallizes in the triclinic system, typically forming pseudo-cubic, rhombohedral-shaped crystals that often exhibit twinning, including both contact and penetration types. Chabazite can appear in various colors, including colorless, white, orange, brown, pink, green, or yellow, with a hardness of 3 to 5 and a specific gravity ranging from 2.0 to 2.2, displaying a vitreous luster. It was first named chabasie in 1792 by Bosc d'Antic before adopting its current name. Chabazite is primarily found in voids and amygdules within basaltic rock formations.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \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":"85.5 48.6 39.4  229","offer_id":49740002689300,"sku":"85.5 48.6 39.4  229","price":155.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250111_131114_72b32bc1-5e6a-4813-b16f-b81aa036b57a.jpg?v=1779189800"},{"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 \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","offer_id":49740003279124,"sku":"85 52 50 139","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":"cinnabar-cinnabaryrte-cinnabarite-mercurblende-crystals-minerals-rocks-crystals2collect","title":"CINNABAR (CINNABARITE or MERCURBLENDE) on CALCITE, HUNAN TIEN MINE, PRC  SMALL CABINET","description":"\u003cp\u003e\u003cstrong\u003eCinnabar\u003c\/strong\u003e, also referred to as \u003cstrong\u003ecinnabarite\u003c\/strong\u003e or \u003cstrong\u003emercurblende\u003c\/strong\u003e, is a vivid scarlet to brick-red variant of mercury(II) sulfide (HgS). It serves as the primary ore for extracting elemental mercury and has historically been the source of the striking red pigment known as vermilion, along with other red mercury-based pigments. \u003c\/p\u003e \u003cp\u003eThis mineral typically forms in veins linked to volcanic activity and alkaline hot springs, displaying symmetry similar to quartz and showing birefringence. Cinnabar has an average refractive index of about 3.2, a hardness rating between 2.0 and 2.5, and a specific gravity around 8.1. Its distinctive color and characteristics arise from its hexagonal crystalline structure, which belongs to the trigonal crystal system, with some crystals exhibiting twinning.\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"69 78 35  153","offer_id":49740003705108,"sku":"69 78 35  153","price":295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250110_192323.jpg?v=1747135724"},{"product_id":"colemanite-crystals-minerals-rocks-crystals2collect","title":"COLEMANITE,  Mustafakemalpaşa, TURKYE UNUSUAL MASSIVE CRYSTALS (LARGE CABINET;","description":"\u003cp\u003e\u003cstrong\u003eColemanite\u003c\/strong\u003e, with the chemical formula Ca2B6O11·5H2O or alternatively CaB3O4(OH)3·H2O, is a borate mineral typically found in evaporite deposits within alkaline lake environments. This secondary mineral arises from the alteration of borax and ulexite. First identified in 1884 near Furnace Creek in Death Valley, it was named in honor of William Tell Coleman, the proprietor of the Harmony Borax Works where it was discovered. Interestingly, Coleman initially suggested the name \"smithite\" to recognize his business partner, Francis Marion Smith.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"140 60 130 1378","offer_id":52542354718996,"sku":"140 60 130 1378","price":1235.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250501_161246.jpg?v=1779190351"},{"product_id":"dioptase-1-crystals-minerals-rocks-crystals2collect","title":"DIOPTASE with CALCITE, TSUMEB MINE, TSUMEB, OSHIKOTO REGION, NAMIBIA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eDioptase\u003c\/strong\u003e is a striking mineral characterized by its vibrant emerald-green to bluish-green hue, classified as a cyclosilicate of copper. It exhibits transparency to translucency and possesses a vitreous to sub-adamantine luster. The chemical formula for dioptase is Cu6Si6O18·6H2O, with an alternative representation as CuSiO2(OH)2. It has a Mohs hardness of 5, comparable to that of tooth enamel, and a specific gravity ranging from 3.28 to 3.35. The mineral features two perfect cleavage directions and one very good cleavage direction, but it is notably fragile, necessitating careful handling. Dioptase crystallizes in a trigonal system, forming six-sided crystals that end in rhombohedra. \u003c\/p\u003e \u003cp\u003eThis mineral is favored by collectors and is occasionally fashioned into small gemstones. Additionally, it can be ground into a pigment for artistic applications. Historically, dioptase was utilized to accentuate the eyes in the Pre-Pottery Neolithic B lime plaster statues found at 'Ain Ghazal, dating back to approximately 7200 BC. In the late 18th century, miners at the Altyn-Tyube mine in Kazakhstan mistakenly believed they had discovered an emerald deposit due to the presence of brilliant green crystals. However, the mineral's lower hardness of 5, in contrast to emerald's hardness of 8, revealed its true identity. In 1797, mineralogist Fr. René Just Haüy recognized this new mineral and named it dioptase, derived from Greek terms meaning \"through\" and \"visible,\" referencing the visible internal cleavage planes in intact crystals.\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eCalcite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"35 35 30 28","offer_id":49740005376276,"sku":"35 35 30 28","price":365.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250125_150041.jpg?v=1779190843"},{"product_id":"fluorite-10-crystals-minerals-rocks-crystals2collect-calcite","title":"FLUORITE (DEEP PURPLE) on CALCITE, ELMWOOD TENNESSEE, USA (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eFluorite\u003c\/b\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.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \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":"52 50 50 68","offer_id":49740006850836,"sku":"52 50 50 68","price":285.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250112_182642.jpg?v=1779191021"},{"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 800350","offer_id":52538267599124,"sku":"110 70 800350","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-7-crystals-minerals-rocks-crystals2collect","title":"FLUORITE, RUBY JACK SPHALERITE, DOLOMITE, Cerro de Pasco Pasco Prov. Pasco PERU (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eFluorite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eSphalerite,\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 15 34 13","offer_id":49740010062100,"sku":"50 15 34 13","price":495.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250125_145615.jpg?v=1779191350"},{"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 60 279","offer_id":52538266255636,"sku":"80 80 60 279","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":"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 \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 \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","offer_id":49740012486932,"sku":"48 41 18 34","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":"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","offer_id":49740014256404,"sku":"63 40 45 179","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-1-chrysocolla-crystals-rocks-minerals-crystals2collect","title":"MALACHITE with CHRYSOCOLLA, LIKASI SHABA, CONGO (small cabinet)","description":"\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eMalachite\u003c\/strong\u003e, a copper carbonate hydroxide mineral with the formula Cu2CO3(OH)2, is known for its opaque, green-banded appearance. It crystallizes in the monoclinic system, typically forming botryoidal, fibrous, or stalagmitic masses in fractures and spaces deep underground, where chemical precipitation is facilitated by the water table and hydrothermal fluids. While individual crystals are uncommon, they do appear as slender to acicular prisms. Occasionally, malachite also forms  pseudomorphs after the more tabular or blocky azurite crystals.\u003cbr\u003e\u003cbr\u003eChrysocolla is the mineral associated with this specimen. It is a hydrous copper phyllosilicate mineral and mineraloid. The structure of Chrysocolla has been under scrutiny, as spectrographic studies from 2006 suggest that materials identified as Chrysocolla may actually be a combination of the copper hydroxide spertiniite and chalcedony. Chrysocolla is typically found in amorphous forms.\u003c\/p\u003e \u003cp\u003eThis specimen is from our collection and acquired mid 1980s. This kind of specimen is hard to get to, as the mine is no longer operational.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 80 80 200","offer_id":52539636187412,"sku":"80 80 80 200","price":425.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2508_27e3f575-5cd6-4ad2-be61-999753ce4681.jpg?v=1779192641"},{"product_id":"malachite-2","title":"MALACHITE and CHRYSOCOLLA, LIKASI SHABA, CONGO (small cabinet)","description":"\u003cp\u003eThis specimen comes from an old collection and is rare. The mine is closed.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \u003cp\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\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003cstrong\u003eChrysocolla\u003c\/strong\u003e is a hydrous copper phyllosilicate mineral and mineraloid characterized by the formula Cu2 – xAlx(H2Si2O5)(OH)4⋅nH2O (where x \u0026lt; 1) or (Cu, Al)2H2Si2O5(OH)4⋅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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 60 60 251","offer_id":52539636154644,"sku":"80 60 60 251","price":340.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2430.jpg?v=1779192668"},{"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)4⋅nH2O (where x \u0026lt; 1) or (Cu, Al)2H2Si2O5(OH)4⋅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 80 251","offer_id":52539636121876,"sku":"100 60 80 251","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","offer_id":49740014453012,"sku":"90 38 70 217","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","offer_id":49740014518548,"sku":"60 52 35 81","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":"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 \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 \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 \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 Štiavnica 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 \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","offer_id":49740017303828,"sku":"100 50 50  121","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":"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 \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","offer_id":49740017697044,"sku":"110 40 60  225","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"},{"product_id":"quartz-sphalerite-chalcopyrite","title":"QUARTZ with SPHALERITE, CHALCOPYRITE, PYRITE and MANGANOCALCITE (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.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \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\u003e\u003c\/p\u003e \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 \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 \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.\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":"95 55 55 161","offer_id":49740017795348,"sku":"95 55 55 161","price":775.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241230_142152.jpg?v=1779194055"},{"product_id":"rhodochrosite-shigaite-crystals-rocks-minerals-crystals2collect","title":"SHIGAITE AND RHODOCHROSITE COMBO, KALAHARI MANGANESE FIELDS, KURUMAN, SOUTH-AFRICA (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eShigaite\u003c\/strong\u003e is a mineral characterized by the formula NaAl3(Mn2+)6(SO4)2(OH)18·12H2O, commonly found in the form of small hexagonal crystals or thin layers. It was first identified in 1985 in Shiga Prefecture, Japan, which is reflected in its name. A major revision of its chemical formula occurred in 1996, revealing sodium as a previously unrecognized component.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 68 40 121","offer_id":49740018876692,"sku":"80 68 40 121","price":650.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2703_1aa47596-f728-4d72-a323-ae4e3f008bec.jpg?v=1779194334"},{"product_id":"rhodochrosite-10-crystals-rocks-minerals-crystals2collect-chalcopyrite-quartz","title":"RHODOCHROSITE, QUARTZ, CHALCOPYRITE, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, 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 \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 \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 \u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"120 50 60 456","offer_id":49740018942228,"sku":"120 50 60 456","price":625.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250131_145603.jpg?v=1779194385"},{"product_id":"rhodochrosite-11-crystals-rocks-minerals-crystals2collect-chalcopyrite-quartz","title":"RHODOCHROSITE, CHALCOPYRITE, QUARTZ, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eRhodochrosite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eChalcopyrite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"65 25 53 94","offer_id":49740018974996,"sku":"65 25 53 94","price":235.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250123_142102.jpg?v=1779194429"},{"product_id":"rhodochrosite-13-crystals-rocks-minerals-crystals2collect-chalcopyrite-quartz","title":"RHODOCHROSITE, CHALCOPYRITE, QUARTZ, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eRhodochrosite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eChalcopyrite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"35 32 45 60","offer_id":49740019040532,"sku":"35 32 45 60","price":225.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250126_120417.jpg?v=1779194458"},{"product_id":"rhodochrosite-14-crystals-rocks-minerals-crystals2collect-pyrite-quartz","title":"RHODOCHROSITE associated with PYRITE, QUARTZ, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU (small cabinet) Former John Betts Collection #12168","description":"\u003cp\u003e\u003cstrong\u003eRhodochrosite\u003c\/strong\u003e is 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.\u003cbr\u003e\u003cbr\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.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFormer John Betts Collection #12168\u003c\/strong\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"82 40 56 204","offer_id":49740019138836,"sku":"82 40 56 204","price":385.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2621.jpg?v=1779194479"},{"product_id":"rhodochrosite-16","title":"RHODOCHROSITE, CHALCOPYRITE, QUARTZ, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eRhodochrosite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eChalcopyrite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"55 40 40 53","offer_id":49740019204372,"sku":"55 40 40 53","price":185.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250123_141900.jpg?v=1779194509"},{"product_id":"rhodochrosite-17-chalcopyrite-quartz-crystals-minerals-crystals2collect-rocks","title":"RHODOCHROSITE, CHALCOPYRITE, QUARTZ, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eRhodochrosite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eChalcopyrite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-AU\"\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\/span\u003e\u003c\/p\u003e \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":"60 35 35 79","offer_id":49740019237140,"sku":"60 35 35 79","price":169.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250123_142247.jpg?v=1779194534"},{"product_id":"rhodochrosite-2","title":"RHODOCHROSITE (SOLD)","description":"\u003cp class=\"MsoNormal\"\u003eRhodochrosite is 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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 80 70","offer_id":49740019728660,"sku":"80 80 70","price":150.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2942.jpg?v=1779194553"},{"product_id":"rhodochrosite-3-calcite-crystals-minerals-crystals2collect-rocks","title":"RHODOCHROSITE with CALCITE, SUNNYSIDE MINE, SILVERTIN, COLORADO, USA (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eRhodochrosite \u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003eis a manganese carbonate mineral characterized by the chemical formula MnCO3. Although it rarely occurs 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.\u003cbr\u003e\u003cbr\u003eThis specimen is from the Sunnyside Mine in Silverton Colorado, mined around 1919.\u003cbr\u003eAn image under Long Wave UV is added.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"53 45 47 144","offer_id":49740019859732,"sku":"53 45 47 144","price":525.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250124_135310.jpg?v=1779194597"},{"product_id":"rhodochrosite-4-siderite-crystals-minerals-crystals2collect-rocks","title":"SIDERITE-RHODOCHROSITE with CALCITE, CARNIC, RUMANIA (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eSiderite\u003c\/strong\u003e is a mineral made up of iron(II) carbonate (FeCO3), deriving its name from the Ancient Greek term for iron, σίδηρος (sídēros). This mineral is an important iron ore, containing approximately 48% iron while being free of sulfur and phosphorus. Iron can be substituted by elements such as zinc, magnesium, and manganese, leading to the formation of various solid solution series, including siderite-smithsonite. siderite-magnesite and \u003cstrong\u003esiderite-rhodochrosite\u003c\/strong\u003e. With a Mohs hardness ranging from 3.75 to 4.25 and a specific gravity of 3.96, siderite exhibits a white streak and a vitreous to pearly luster. It becomes antiferromagnetic below its Néel temperature of 37 K (−236 °C), which aids in its identification. Siderite crystallizes in the trigonal system, typically forming rhombohedral crystals with curved and striated faces, and can also appear in massive forms. Its color varies from yellow to dark brown or black, with the darker hues often attributed to manganese content. Commonly found in hydrothermal veins, siderite is associated with minerals such as barite, fluorite, and galena. It frequently occurs as a diagenetic mineral in shales and sandstones, where it can form concretions that may encase well-preserved fossils. In sedimentary environments, siderite typically forms at shallow burial depths, and its elemental makeup often reflects the conditions of the surrounding sediments. Recent research has also utilized the oxygen isotopic composition of sphaerosiderite, a soil-associated variant, as an indicator of the isotopic composition of meteoric water shortly after its deposition.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"87.6 44.5 23 69","offer_id":49740019958036,"sku":"87.6 44.5 23 69","price":295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250320_170004.jpg?v=1779194625"},{"product_id":"shigaite-crystals-minerals-crystals2collect-rocks","title":"SHIGAITE, KALAHARI MANGANESE FIELDS, KURUMAN, SOUTH-AFRICA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eShigaite \u003c\/strong\u003eis an extremely mineral characterized by the chemical formula NaAl3(Mn2+)6(SO4)2(OH)18·12H2O, typically found in the form of small hexagonal crystals or delicate coatings. It was first identified in 1985 in Shiga Prefecture, Japan, and its chemical composition underwent significant revision in 1996, revealing sodium as a previously unrecognized component. \u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eShigaite \u003c\/strong\u003eappears as hexagonal tabular crystals that can reach sizes of up to 2 cm (0.79 in) or as thin films and coatings. The mineral exhibits a range of colors, including yellow, burnt orange, brown, and black. It is commonly found in metamorphosed manganese ore deposits and serves as the Mn2+ analogue of motukoreaite.\u003c\/p\u003e \u003cp\u003e \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"40 30 20 34","offer_id":49740020023572,"sku":"40 30 20 34","price":650.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250327_095320.jpg?v=1779194638"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/collections\/DSC_0401_d57f6045-a286-4742-9509-8aba9f624d02.jpg?v=1780545729","url":"https:\/\/crystals2collect.com\/collections\/carbonates.oembed?page=6","provider":"Crystals2Collect ","version":"1.0","type":"link"}