{"title":"SILICATES","description":"\u003ch2\u003eExplore Our SILICATES Collection\u003c\/h2\u003e\n\u003cp\u003eSILICATES are the most abundant minerals on Earth, making up roughly 90 percent of the planet's crust. They form through the bonding of silicon and oxygen with various metals and elements. This makes them essential to geology and mineral collecting worldwide.\u003c\/p\u003e\n\u003cp\u003eIn mineralogy, silica—also called silicon dioxide (SiO2)—is classified as a silicate mineral. The most common naturally occurring form of silica is \u003cstrong\u003eQUARTZ\u003c\/strong\u003e. Quartz appears in many varieties, from clear crystals to coloured gemstone forms.\u003c\/p\u003e\n\u003cp\u003eOther well-known members of the silicate family include \u003cstrong\u003e\u003ca href=\"https:\/\/crystals2collect.com\/products\/tourmaline-6-crystals-rocks-crystals2collect-minerals?variant=49740027658516\" target=\"_self\" title=\"Yellow Tourmaline\"\u003eTOURMALINE\u003c\/a\u003e\u003c\/strong\u003e, feldspar, mica, and garnet. Each group displays unique crystal structures and physical properties. Collectors prize these minerals for their colour, clarity, and formation diversity.\u003c\/p\u003e\n\u003cp\u003eBrowse our curated selection of silicate specimens sourced from localities around the world. Each piece is carefully chosen for quality and presentation. Every listing includes dimensions measured in millimeters (L × W × H), weight in grams, locality, and specimen number (SKU).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease click on any picture to view additional photos and full details, including dimensions like 300 × 240 × 340 mm, weight in grams, locality, and SKU number.\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 \u003cp\u003eIts name originates from the Greek term aktis, which translates to \"beam\" or \"ray,\" reflecting its fibrous structure.\u003c\/p\u003e \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 \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","offer_id":49739997774100,"sku":"80 40 60 150","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":"aegirine-1-crystals-minerals-crystals2collect-rocks-microcline","title":"AEGIRINE ON MICROCLINE, MOUNT MALOSA, ZOMBA, MALAWI (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-AU\"\u003e\u003cstrong\u003eAegirine\u003c\/strong\u003e belongs to the clinopyroxene group of inosilicate minerals and serves as the sodium endmember of the aegirine–augite series. Its chemical composition is represented by the formula NaFeSi2O6, where iron exists as the Fe3+ ion. Within the aegirine–augite series, sodium can be partially substituted by calcium, while iron(II) and magnesium can replace iron(III) to maintain charge balance. Additionally, aluminum can substitute for iron(III). A notable variety of this mineral is acmite, which is characterized by its fibrous green appearance.\u003c\/span\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan lang=\"EN-AU\"\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan lang=\"EN-AU\"\u003e\u003cstrong\u003eAegirine\u003c\/strong\u003e typically forms dark green monoclinic prismatic crystals, exhibiting a glassy luster and perfect cleavage. Its hardness on the Mohs scale ranges from 5 to 6, and it has a specific gravity that falls between 3.2 and 3.4.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eMicrocline \u003c\/b\u003e(KAlSi3O8) is a significant tectosilicate mineral that contributes to the formation of igneous rocks. As a potassium-rich alkali feldspar, it often contains trace amounts of sodium and is frequently found in granite and pegmatite formations. Microcline develops during the gradual cooling of orthoclase and exhibits greater stability at lower temperatures compared to orthoclase. In contrast, sanidine represents a polymorph of alkali feldspar that remains stable at even higher temperatures. The mineral can appear in various colors, including clear, white, pale yellow, brick red, or green, and is typically identified by its distinctive cross-hatch twinning, which results from the transformation of monoclinic orthoclase into triclinic microcline.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 45 20 42","offer_id":49739998069012,"sku":"50 45 20 42","price":145.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250118_103106.jpg?v=1769222090"},{"product_id":"amaldine-grossular-garnet-garnets-crystals-minerals-crystals2collect-rocks","title":"GROSSULAR, STEIGEN, NORDLAND, NORWAY (SINGLE LARGE CRYSTAL 50 x 50 x 50 mm) (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eGrossular\u003c\/strong\u003e is 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 \u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e \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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 50 50 179","offer_id":49739998560532,"sku":"50 50 50 179","price":65.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250113_100558.jpg?v=1769222101"},{"product_id":"amazonite-albite-crystals-minerals-crystals2collect-rocks","title":"AMAZONITE ON ALBITE, PARK COUNTY, COLORADO, USA (small cabinet)","description":"\u003cp\u003eALBITE\u003c\/p\u003e \u003cp\u003eAmazonite, often referred to as amazonstone, is a green tectosilicate mineral classified as a variety of potassium feldspar known as microcline. The formula represents its chemical composition KAlSi3O8, which is polymorphic with orthoclase. The Amazon River lent its name to the mineral because people historically sourced green stones there, though it remains uncertain if those stones were indeed amazonite. Despite its use in jewelry for over three millennia, evidenced by archaeological discoveries in ancient Egypt and Mesopotamia, any ancient or medieval sources did not document it. The mineral was formally recognized as distinct only in the 18th century.\u003cbr\u003e\u003cbr\u003eAlbite is a type of plagioclase feldspar mineral, specifically the sodium endmember of the plagioclase solid solution series, characterized by having less than 10% anorthite content. The chemical formula for pure albite is NaAlSi3O8, and it falls under the category of tectosilicates. Typically, albite appears in a pure white color, which is reflected in its name derived from the Latin word \"albus.\" This mineral is frequently found in felsic rocks.\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 50 65 296","offer_id":52538313638164,"sku":"80 50 65 296","price":145.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2609_03c2023d-7698-4a73-b22f-32b7ceb70982.jpg?v=1769222029"},{"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":"axinite-magnesioaxinite-crystals-crystals2collect-rocks-minerals","title":"AXINITE (-Mg) - MAGNESIOAXINITE, PUYVA, SUBPOLAR URALS, RUSSIA (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eAxinite\u003c\/strong\u003e is a mineral that ranges in color from brown to violet-brown, or reddish-brown, and belongs to a group characterized by bladed formations. It is composed of calcium aluminium boro-silicate, with the chemical formula (Ca,Fe,Mn)3Al2BO3Si4O12OH. Notably, axinite exhibits both pyroelectric and piezoelectric properties.\u003c\/p\u003e \u003cp\u003eThe axinite group consists of the following varieties:\u003c\/p\u003e \u003cp\u003eAxinite-(Fe), also known as ferroaxinite, has the formula Ca2Fe2+Al2BOSi4O15(OH) and is rich in iron, displaying colors such as clove-brown, brown, plum-blue, and pearl-gray.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eAxinite-(Mg), or magnesioaxinite\u003c\/strong\u003e, is represented by the formula Ca2MgAl2BOSi4O15(OH) and is rich in magnesium, appearing in shades from pale blue to pale violet, as well as light brown to light pink.\u003c\/p\u003e \u003cp\u003eAxinite-(Mn), referred to as manganaxinite, has the formula Ca2Mn2+Al2BOSi4O15(OH) and is rich in manganese, showcasing colors like honey-yellow, clove-brown, and brown to blue.\u003c\/p\u003e \u003cp\u003eTinzenite, with the formula (CaFe2+Mn2+)3Al2BOSi4O15(OH), is an iron-manganese intermediate that can be yellow or brownish yellow-green.\u003c\/p\u003e \u003cp\u003eAdditionally, axinite is occasionally utilized as a gemstone.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"75 60 60 170","offer_id":49739999871252,"sku":"75 60 60 170","price":945.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250602_165154.jpg?v=1771216352"},{"product_id":"benitoite-2-neptunite-joaquinite-natrolite-serpentine-crystals-minerals-crystals2collect-rocks","title":"BENITOITE with NEPTUNITE, JOAQUINTE on NATROLITE and SERPENTINE, SAN BENITO COUNTY, BENITOITE GEM MT DIABLO, CA, USA","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eBenitoite\u003c\/strong\u003e is a rare blue mineral composed of barium titanium cyclosilicate, primarily located in hydrothermally altered serpentinite. It forms in the high-pressure, low-temperature conditions characteristic of subduction zones at convergent plate boundaries. Under short-wave ultraviolet light, benitoite fluoresces a bright blue to bluish white, while the less common clear to white crystals exhibit a red fluorescence under long-wave UV light.\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003eDiscovered in 1907 by prospector James M. Couch in the San Benito Mountains of California, it was initially mistaken for sapphire due to its color. In 1909, Dr. George D. Louderback at the University of California, Berkeley, identified it as a new mineral, naming it benitoite after the nearby San Benito River. While benitoite is found in various locations worldwide, high-quality gemstones have only been sourced from the Benito Gem Mine in California. Other occurrences have been noted in Montana, Arkansas, Japan, and Australia, but these specimens are generally smaller and considered accessory minerals. In 1985, benitoite was designated as California's official state gem. The mineral typically crystallizes in a hexagonal structure, with non-gem varieties occasionally exhibiting a rare six-pointed twinned form.\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNeptunite\u003c\/b\u003e is a silicate mineral characterized by the formula KNa2Li(Fe2+, Mn2+)2Ti2Si8O24. It forms a series with mangan-neptunite as manganese content increases, while watatsumiite is a variant where vanadium substitutes titanium in the composition. First identified in 1893 from the Narssârssuk pegmatite in West Greenland, neptunite is also located in natrolite veins within glaucophane schist in San Benito County, California, as well as in Mont Saint-Hilaire, Quebec, and the Kola Peninsula in Russia. The mineral derives its name from Neptune, the Roman god of the sea, due to its connection with aegirine, named after Àgir, the Scandinavian sea deity.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eJoaquinite\u003c\/strong\u003e, with the chemical formula (Ce), NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O, is an exceptionally rare silicate mineral that contains cerium and exhibits a honey-yellow to brown hue along with a vitreous luster. It was named in 1909 by G.D. Louderback and W.C. Blasdale, referencing the Joaquin Ridge in the Diablo Range, the site of its discovery, which also borders the San Joaquin Valley. The name reflects its cerium content, a designation added by Nickel \u0026amp; Mandarino in 1987.\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eNatrolite\u003c\/strong\u003e is a mineral species classified as a tectosilicate and is part of the zeolite group. Its chemical composition is represented by the formula Na2Al2Si3O10·2H2O, indicating it is a hydrated sodium and aluminum silicate. The mineral was first identified in Hohentwiel, Hegau, Germany, which serves as its type locality.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 40 30 37","offer_id":49740000461076,"sku":"50 40 30 37","price":2750.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250602_092916.jpg?v=1772791754"},{"product_id":"benitoite-3-neptunite-joaquinite-natrolite-crystals-minerals-crystals2collect-rocks","title":"BENITOITE (BLUE), NEPTUNITE (BLACKISH RED), JOAQUINITE (BROWN) on NATROLITE (WHITE), SAN BENITO COUNTY, BENITOITE GEM MT DIABLO, CA, USA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eBenitoite\u003c\/strong\u003e, \u003cspan\u003eBaTi(Si\u003c\/span\u003e\u003csub\u003e3\u003c\/sub\u003e\u003cspan\u003eO\u003c\/span\u003e\u003csub\u003e9\u003c\/sub\u003e\u003cspan\u003e), \u003c\/span\u003eis an extremely rare blue mineral composed of barium titanium cyclosilicate, primarily located in hydrothermally altered serpentinite. It forms in the high-pressure, low-temperature conditions characteristic of subduction zones at convergent plate boundaries. Under short-wave ultraviolet light, benitoite fluoresces a bright blue to bluish white, while the less common clear to white crystals exhibit a red fluorescence under long-wave UV light.\u003c\/p\u003e \u003cp\u003eDiscovered in 1907 by prospector James M. Couch in the San Benito Mountains of California, it was initially mistaken for sapphire due to its color. In 1909, Dr. George D. Louderback at the University of California, Berkeley, identified it as a new mineral, naming it benitoite after the nearby San Benito River. While benitoite is found in various locations worldwide, high-quality gemstones have only been sourced from the Benito Gem Mine in California. Other occurrences have been noted in Montana, Arkansas, Japan, and Australia, but these specimens are generally smaller and considered accessory minerals. In 1985, benitoite was designated as California's official state gem. The mineral typically crystallizes in a hexagonal structure, with non-gem varieties occasionally exhibiting a rare six-pointed twinned form.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNeptunite\u003c\/strong\u003e is a silicate mineral characterized by the chemical formula KNa2Li(Fe2+, Mn2+)2Ti2Si8O24. It forms a series with mangan-neptunite as manganese content increases, while watatsumiite is a variant where vanadium substitutes titanium in the structure. First identified in 1893 from the Narssârssuk pegmatite in West Greenland, neptunite is also located in natrolite veins within glaucophane schist in San Benito County, California, as well as in Mont Saint-Hilaire, Quebec, and the Kola Peninsula in Russia. The mineral derives its name from Neptune, the Roman god of the sea, due to its connection with aegirine, which is linked to Àgir, the Scandinavian sea deity.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eJoaquinite\u003c\/strong\u003e, with the chemical formula (Ce), NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O, is an exceptionally rare silicate mineral that contains cerium and exhibits a honey-yellow to brown hue along with a vitreous luster. It was named in 1909 by G.D. Louderback and W.C. Blasdale, referencing the Joaquin Ridge in the Diablo Range, the site of its discovery, which also borders the San Joaquin Valley. The name reflects its cerium content, a designation added by Nickel \u0026amp; Mandarino in 1987.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eNatrolite\u003c\/strong\u003e is a mineral species classified as a tectosilicate and is part of the zeolite group. Its chemical composition is represented by the formula Na2Al2Si3O10·2H2O, indicating it is a hydrated sodium and aluminum silicate. The mineral was first identified in Hohentwiel, Hegau, Germany, which serves as its type locality. \u003c\/p\u003e \u003cp\u003eThe term \"natrolite\" was introduced by Martin Heinrich Klaproth in 1803, deriving from the Greek words for soda (natron) and stone (lithos), reflecting its sodium content. Informally, it is also known as needle stone or needle-zeolite, a reference to the slender, acicular crystals that often form in divergent clusters. These crystals can frequently exhibit epitaxial overgrowths of natrolite, mesolite, and gonnardite in various arrangements.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"45 20 32 28","offer_id":49740000493844,"sku":"45 20 32 28","price":10500.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250113_075227.jpg?v=1772791806"},{"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 \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","offer_id":52401694867732,"sku":"130 100 90  1441","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":"beryl-11-aquamarine-muscovite-crystals-minerals-crystals2collect-rocks","title":"BERYL (TABULAR) VAR AQUAMARINE on MUSCOVITE (MICA), PING WU BERYL MINE XUEBAODING PINGWU CO MIANYANG SICHUAN PROV PRC (small cabinet)","description":"\u003cp\u003eTABULAR BERYL (AQUAMARINE) , MICA\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eBeryl\u003c\/strong\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 \u003cp\u003e\u003cspan\u003eMuscovite, 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\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"90 45 53 190","offer_id":49740000592148,"sku":"90 45 53 190","price":425.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2504_a1e9a30c-9729-45fd-a5e8-beb318fc526a.jpg?v=1772791854"},{"product_id":"beryl-4-crystals-minerals-crystals2collect-rocks","title":"BERYL, LARGE CRYSTAL, Carnaiba, BRAZIL (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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"70 30 30 300","offer_id":49740000919828,"sku":"70 30 30 300","price":250.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250109_164744.jpg?v=1772791864"},{"product_id":"fluorite-quartz-biotite-crystals-minerals-crystals2collect-rocks","title":"FLUORITE (BLUE) WITH QUARTZ AND BIOTITE, HUNAN, PRC (cabinet)","description":"\u003cp class=\"MsoNormal\"\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.\u003cbr\u003e\u003cbr\u003eThe fluorite crystals are hard to catch on the photo as they are water clear.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 80 70  609","offer_id":49740001018132,"sku":"100 80 70  609","price":395.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3134.jpg?v=1779189091"},{"product_id":"beryl-6","title":"BERYL VAR AQUAMARINE ON MUSCOVITE FISHTAIL and DOLOMITE, GILGIT, PAKISTAN (small 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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 70 50 173","offer_id":49740001050900,"sku":"80 70 50 173","price":1700.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250611_170649.jpg?v=1779189198"},{"product_id":"beryl-7-emerald-crystals-minerals-crystals2collect-rocks","title":"BERYL var EMERALD, COLOMBIA (thumbnail)","description":"\u003cp\u003e\u003cstrong\u003eBeryl\u003c\/strong\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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"14.4 11.2 8","offer_id":49740001083668,"sku":"14.4 11.2 8","price":255.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250322_122504.jpg?v=1779189223"},{"product_id":"beryl-9-aquamarin-crystals-minerals-crystals2collect-rocks","title":"BERYL var AQUAMARINE, Minas Gerais, BRAZIL (small cabinet)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eBeryl\u003c\/strong\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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 60 50  218","offer_id":49740001181972,"sku":"80 60 50  218","price":175.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250322_104655.jpg?v=1779189231"},{"product_id":"datolite-and-apophillite-crystals-minerals-rocks-crystals2collect","title":"DATOLITE and APOPHYLLITE, POONA, INDIA (large cabinet)","description":"\u003cp\u003e\u003cstrong\u003eDatolite \u003c\/strong\u003eis a calcium boron hydroxide nesosilicate with the chemical formula CaBSiO4(OH). It was first identified by Jens Esmark in 1806, who named it from the Greek words δατεῖσθαι, meaning \"to divide,\" and λίθος, meaning \"stone,\" reflecting the mineral's granular structure. \u003c\/p\u003e \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 \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eApophyllite\u003c\/strong\u003e 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 (\u003cspan style=\"font-family: 'Arial',sans-serif;\"\u003eἀ\u003c\/span\u003eποφυλλίζω), 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":"160 60 60  284","offer_id":49740002427156,"sku":"160 60 60  284","price":310.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3342.jpg?v=1779189671"},{"product_id":"cavansite-stilbite-crystals-minerals-rocks-crystals2collect","title":"CAVANSITE with STILBITE, Wagholi Mine, Poona, INDIA (small cabinet)","description":"\u003cp\u003e\u003cstrong\u003eCavansite\u003c\/strong\u003e, characterized by its chemical formula of calcium vanadium silicate, is a striking deep blue hydrous mineral belonging to the phyllosilicate group. This secondary mineral is typically found in basaltic and andesitic rock formations alongside various zeolite minerals, with its distinctive blue hue attributed to the presence of vanadium ions. First identified in 1967 in Malheur County, Oregon, cavansite is considered relatively uncommon and exhibits polymorphism with the even rarer pentagonite. The mineral is predominantly located in Pune, India, and within the expansive Deccan Traps igneous province.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \u003cp class=\"MsoNormal\"\u003e\u003cb\u003eStilbite\u003c\/b\u003e refers to a group of tectosilicate minerals within the zeolite family. Originally classified as a distinct mineral species until 1997, it was redefined by the International Mineralogical Association to encompass a series, which includes the specific types of Stilbite-Ca and Stilbite-Na. Stilbite-Ca, the more prevalent variant, is a hydrous silicate composed of calcium, sodium, and aluminum, represented by the formula NaCa4(Si27Al9)O72·28(H2O). In contrast, Stilbite-Na features a higher sodium content compared to calcium. These two species appear identical to the naked eye, and the term stilbite continues to be used in contexts where detailed testing has not been conducted.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"80 40 65 142","offer_id":49740002558228,"sku":"80 40 65 142","price":175.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250112_182454.jpg?v=1779189776"},{"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":"chabazite-2-phakolite-crystals-minerals-rocks-crystals2collect-zeolite","title":"CHABAZITE VARIETY PHAKOLITE, KOZAKOV TSJECH REPUBLIC (cabinet)","description":"\u003cp\u003eVARIETY PHAKOLITE\u003c\/p\u003e \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. It includes recognized varieties such as Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, which are distinguished by 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. Its hardness ranges from 3 to 5, with a specific gravity between 2.0 and 2.2, and it possesses a vitreous luster.\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"105 38 75 218","offer_id":52538271826196,"sku":"105 38 75 218","price":285.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2655_6cb3feb4-e91a-48f5-ada9-5f6bc32f8856.jpg?v=1779189848"},{"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":"charoite-crystals-minerals-rocks-crystals2collect-aegirine","title":"CHAROITE with AEGIRINE, MURUN MASSIV, TORGO RIVER BASIN, YAKUTIA, RUSSIA  MINIATURE","description":"\u003cp\u003e\u003cstrong\u003eCharoite \u003c\/strong\u003eis a rare silicate mineral characterized by the chemical formula K(Ca,Na)2Si4O10(OH,F)•H2O, first identified in 1978. The Chara River, located 70 kilometers from its discovery site, gave charoite its name. Initially, the mineral was suspected to be a synthetic creation due to its vibrant purple hue, which led to misconceptions about its authenticity.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eCharité \u003c\/strong\u003eexhibits a translucent lavender to purple coloration and possesses a pearly luster. The charoite primarily occurs in a massive form with conchoidal fractures. Its unique swirling, fibrous texture can appear chatoyant. Although reports state that people discovered it in the 1940s, it gained wider recognition only after its formal description in 1978. In its natural state, charoite may appear opaque and unremarkable, which likely contributed to its delayed acknowledgment. The mineral's composition includes significant amounts of oxygen (43.75%), silicon (27.65%), and calcium (17.53%), along with potassium (10.69%), and a small amount of hydrogen (0.39%). \u003c\/p\u003e \u003cp\u003eAegirine belongs to the clinopyroxene group of inosilicate minerals and serves as the sodium endmember of the aegirine–augite series. Its chemical composition is represented by the formula NaFeSi2O6, where iron exists as the Fe3+ ion. Within the aegirine–augite series, sodium can be partially substituted by calcium, while iron(II) and magnesium can replace iron(III) to maintain charge balance. Additionally, aluminum can substitute for iron(III). A notable variety of this mineral is acmite, which is characterized by its fibrous green appearance.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eAegirine\u003c\/strong\u003e typically forms dark green monoclinic prismatic crystals, exhibiting a glassy luster and perfect cleavage. Its hardness on the Mohs scale ranges from 5 to 6, and it has a specific gravity that falls between 3.2 and 3.4.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"48 30 30  49","offer_id":49740003574036,"sku":"48 30 30  49","price":635.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250116_173622.jpg?v=1779190285"},{"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)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\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"46 30 28 28","offer_id":49740003639572,"sku":"46 30 28 28","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":"chryroprase-chrysophrase-chrysoprasus-crystals-minerals-rocks-crystals2collect","title":"CHRYSOPRASE, MARLBOUGH CREEK, AUSTRALIA  (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eChrysoprase\u003c\/strong\u003e, also known as \u003cstrong\u003echrysophrase\u003c\/strong\u003e or \u003cstrong\u003echrysoprasus\u003c\/strong\u003e, is a type of chalcedony, which is a cryptocrystalline form of silica that contains trace amounts of nickel. Typically, it exhibits an apple-green hue, although its color can range from a turquoise-like cyan to a deep green. The darker shades of chrysoprase are often called prase, although this term can also refer to chlorite-included quartz and is more of a color descriptor than a strictly defined mineral category.\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"200 70 80 910","offer_id":49740003672340,"sku":"200 70 80 910","price":290.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3100.jpg?v=1779190336"},{"product_id":"cookeite-crystals-minerals-rocks-crystals2collect-quartz","title":"COOKEITE ON QUARTZ, STAND ON YOUR HEAD CLAIM # 1, SALINE COUNTY, ARKANSAS, USA  (miniature)","description":"\u003cp\u003e\u003cstrong\u003eCookeite \u003c\/strong\u003eis an extremely rare mineral belonging to the silicate group and specifically the phyllosilicate subgroup, classified within the chlorite family, with the chemical formula LiAl4(Si3Al)O10(OH)8. This soft, low-density mineral exhibits a range of colors and features a crystalline structure composed of alternating layers of LiAl2(OH)6 and Al2O4(OH)2Si8O12, which can exist in multiple polytypes. Typically, cookeite is formed through the hydrothermal alteration of silicates found in pegmatites, occurring at relatively low temperatures, generally below 200 °C, and under varying pressure conditions.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 22 45 64","offer_id":49740004131092,"sku":"50 22 45 64","price":295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20241227_092702.jpg?v=1779190398"},{"product_id":"danburite-4-crystals-minerals-rocks-crystals2collect","title":"DANBURITE, CHARCAS, SAN LUIS, POTOSI, MEXICO (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eDanburite\u003c\/strong\u003e is a calcium boron silicate mineral represented by the chemical formula CaB2(SiO4)2. With a Mohs hardness ranging from 7 to 7.5 and a specific gravity of 3.0, it exhibits an orthorhombic crystal structure. While it is commonly colorless, resembling quartz, it can also appear in shades of pale yellow or yellowish-brown, primarily found in contact metamorphic rocks.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"114 41 27 151","offer_id":52538269139220,"sku":"114 41 27 151","price":325.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2644.jpg?v=1779190745"},{"product_id":"danburite-2-crystals-minerals-rocks-crystals2collect","title":"DANBURITE, MINA AURORA, SAN LUIS POTOSI, CHARCAS,MEXICO (miniature)","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan lang=\"EN-AU\"\u003eDanburite\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-AU\"\u003e is a calcium boron silicate mineral represented by the chemical formula CaB2(SiO4)2. With a Mohs hardness ranging from 7 to 7.5 and a specific gravity of 3.0, it exhibits an orthorhombic crystal structure. While it is commonly colorless, resembling quartz, it can also appear in shades of pale yellow or yellowish-brown, primarily found in contact metamorphic rocks.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"50 18 20 27","offer_id":49740004917524,"sku":"50 18 20 27","price":195.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250219_134926.jpg?v=1779190759"},{"product_id":"datolite-1-crystals-minerals-rocks-crystals2collect-quartz","title":"DATOLITE with QUARTZ, BORON PIT, DALNEGORSK, PRIMORSKIJ, KRAJ, RUSSIA (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eDatolite\u003c\/strong\u003e is a calcium boron hydroxide nesosilicate, represented by the chemical formula CaBSiO4(OH). It was first identified by Jens Esmark in 1806 and was named by him from the Greek words δατεῖσαι, meaning \"to divide,\" and λίθος, meaning \"stone,\" in reference to the mineral's granular structure.\u003c\/p\u003e \u003cp\u003eDatolite crystallizes in the monoclinic system, forming prismatic crystals and nodular masses. Its luster is vitreous, and it can be found in various colors including brown, yellow, light green, or colorless. The mineral a Mohs hardness of 5.5 and a specific gravity ranging from 2.8 to 3.0.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"90 50 50  353","offer_id":49740004983060,"sku":"90 50 50  353","price":275.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3518.jpg?v=1779190774"},{"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 \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 \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","offer_id":49740005015828,"sku":"51.5 38.8 34.7  81","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":"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":"dioptase-2-crystals-minerals-rocks-crystals2collect","title":"DIOPTASE,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.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"30 30 25 19","offer_id":49740005409044,"sku":"30 30 25 19","price":345.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250124_134655.jpg?v=1779190854"},{"product_id":"dioptase-7-crystals-minerals-rocks-crystals2collect","title":"DIOPTASE, TSUMEB MINE, TSUMEB, OSHIKOTO REGION, NAMIBIA (small cabinet)","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 a range of transparency from transparent to translucent and possesses a vitreous to sub-adamantine luster. The chemical composition of 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, typically forming six-sided crystals that culminate in rhombohedral shapes.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"70 30 55 75","offer_id":52538268418324,"sku":"70 30 55 75","price":685.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2985.jpg?v=1779190865"},{"product_id":"epidote-1-crystals-minerals-rocks-crystals2collect","title":"EPIDOTE associated with QUARTZ, Hordaland Norway (large cabinet)","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e \u003cp\u003eEpidote, with the chemical formula Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH), commonly forms well-developed crystals that belong to the monoclinic system. These crystals typically exhibit a prismatic shape, with their elongation occurring perpendicular to the single plane of symmetry.\u003c\/p\u003e \u003cp\u003eEpidote is a mineral composed of calcium aluminium silicate hydroxide \u003cspan style=\"font-size: 0.875rem;\"\u003ewith the chemical formula \u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eCa2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) \u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eand is categorized as a sorosilicate which commonly forms well-developed crystals that belong to the monoclinic system. These crystals typically exhibit a prismatic shape, with their elongation occurring perpendicular to the single plane of symmetry. \u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eIt is commonly found in metamorphic rocks, typically forming through the alteration of plagioclase feldspar, pyroxenes, and amphiboles during contact metamorphism and hydrothermal processes. Additionally, epidote can be present in basalt and granite formations. It serves as a significant rock-forming mineral, notably in two types: epidosite, which consists of epidote and quartz, and unakite, which combines epidote with pink orthoclase. Although the locations of these rocks are relatively rare, they can contain substantial amounts of epidote. \u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eThe mineral was named by René Just Haüy in 1801, deriving its name from the Greek word \"epidosis,\" meaning 'increase,' due to the distinctive elongation of one side of its crystal prism. A notable characteristic of epidote is its remarkable pleochroism, allowing it to exhibit different colors when viewed from various angles.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"130 70 90 300","offer_id":52538268057876,"sku":"130 70 90 300","price":210.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2519.jpg?v=1779190916"},{"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 \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 \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","offer_id":49740010258708,"sku":"60 35 50 158","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":"garnet-3-crystals-minerals-rocks-crystals2collect-spessartine-muscovite-almandine","title":"GARNET (SPESSARTINE, 14 CRYSTALS), Outokumpu Finland (cabinet)","description":"\u003cp\u003e14 CRYSTALS ON MUSCOVITE\u003c\/p\u003e \u003cp\u003eGarnets are a category of silicate minerals that have been utilized as gemstones and abrasives since the Bronze Age. While all garnet species share similar physical characteristics and crystal structures, they vary in their chemical compositions. The main types include pyrope, almandine, spessartine, grossular (which includes varieties such as hessonite or cinnamon-stone and tsavorite), uvarovite, and andradite. Garnets are classified into two solid solution series: the pyralspite series, comprising pyrope, almandine, and spessartine with the formula [Mg,Fe,Mn]3Al2(SiO4)3, and the ugrandite series, which includes uvarovite, grossular, and andradite with the formula Ca3[Cr,Al,Fe]2(SiO4)3.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"125 90 50 924","offer_id":52538266616084,"sku":"125 90 50 924","price":625.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2831.jpg?v=1779191446"},{"product_id":"grossular-2","title":"GARNETS GROSSULAR, JEFFREY MINE, ASBESTOS QUEBEC, CANADA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eGarnets \u003c\/strong\u003eare a category of silicate minerals that have been utilized as gemstones and abrasives since the Bronze Age. While all garnet species share similar physical characteristics and crystal structures, they vary in their chemical compositions. The main types include pyrope, almandine, spessartine, grossular (which includes varieties such as hessonite or cinnamon-stone and tsavorite), uvarovite, and andradite. Garnets are classified into two solid solution series: the pyralspite series, comprising pyrope, almandine, and spessartine with the formula [Mg,Fe,Mn]3Al2(SiO4)3, and the ugrandite series, which includes uvarovite, grossular, and andradite with the formula Ca3[Cr,Al,Fe]2(SiO4)3.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"32 20 11 7","offer_id":49740011208980,"sku":"32 20 11 7","price":195.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250415_125902.jpg?v=1779191828"},{"product_id":"grossular-3-garnets-garnet-crystals-rocks-minerals-crystals2collect","title":"GARNETS GROSSULAR, JEFFREY MINE, ASBESTOS QUEBEC, CANADA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eGarnets\u003c\/strong\u003e are a category of silicate minerals that have been utilized as gemstones and abrasives since the Bronze Age. While all garnet species share similar physical characteristics and crystal structures, they vary in their chemical compositions. The main types include pyrope, almandine, spessartine, grossular (which includes varieties such as hessonite or cinnamon-stone and tsavorite), uvarovite, and andradite. Garnets are classified into two solid solution series: the pyralspite series, comprising pyrope, almandine, and spessartine with the formula [Mg,Fe,Mn]3Al2(SiO4)3, and the ugrandite series, which includes uvarovite, grossular, and andradite with the formula Ca3[Cr,Al,Fe]2(SiO4)3.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"32 25 10 8","offer_id":49740011274516,"sku":"32 25 10 8","price":155.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250415_125955.jpg?v=1779191834"},{"product_id":"grossular-5-garnets-garnet-crystals-rocks-minerals-crystals2collect","title":"GROSSULAR GARNETS, JEFFREY MINE, ASBESTOS QUEBEC, CANADA (miniature)","description":"\u003cp\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 \u003cp\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.\u003cbr\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"27 24 15 6","offer_id":49740011372820,"sku":"27 24 15 6","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250327_153140.jpg?v=1779191841"},{"product_id":"grossular-6-garnets-garnet-crystals-rocks-minerals-crystals2collect","title":"GROSSULAR GARNETS, JEFFREY MINE, ASBESTOS QUEBEC, CANADA (miniature)","description":"\u003cp\u003eGrossular is 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 \u003cp\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","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"32 25 18 15","offer_id":49740011438356,"sku":"32 25 18 15","price":150.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250112_182340.jpg?v=1779191852"},{"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 \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 \u003cp class=\"MsoNormal\"\u003eThis specimen has at least three other minerals present including quartz, haematite. Definitely some specimen for micro mounts. \u003c\/p\u003e \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","offer_id":49740011471124,"sku":"42 80 78 271","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":"hemimorphite-1-crystals-rocks-minerals-crystals2collect-smithonite","title":"HEMIMORPHITE, SANTA EULALIA, CHIHUAHUA. MEXICO (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eHemimorphite\u003c\/strong\u003e, represented by the chemical formula Zn4(Si2O7)(OH)2·H2O, is a constituent of the mineral calamine. This silicate mineral, along with smithsonite (ZnCO3), has been traditionally extracted from the upper regions of zinc and lead ores. Initially, both minerals were thought to be identical and categorized under the name calamine. However, in the latter part of the 18th century, it was revealed that these distinct compounds coexist within calamine, despite their close resemblance.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 50 70 260","offer_id":52538266157332,"sku":"100 50 70 260","price":825.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250203_110659_b56cbc98-801e-4635-8338-06853b856baf.jpg?v=1779192118"},{"product_id":"hemimorphite-2-smithonite-crystals-rocks-minerals-crystals2collect","title":"HEMIMORPHITE and SMITHONITE, Durango Mexico (miniature)","description":"\u003cp\u003eHemimorphite is a chemical compound represented by the formula Zn4(Si2O7)(OH)2·H2O and is a constituent of the mineral calamine. This silicate mineral, along with smithsonite (ZnCO3), has been historically extracted from the upper regions of zinc and lead ores. Initially, both minerals were thought to be identical and categorized under the name calamine. However, in the latter part of the 18th century, it was determined that these distinct compounds coexist within calamine, despite their close resemblance.\u003c\/p\u003e \u003cp\u003eMiniature\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"30 20 16 51","offer_id":52538266124564,"sku":"30 20 16 51","price":155.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3003.jpg?v=1779192146"},{"product_id":"hessonite-crystals-rocks-minerals-crystals2collect-cinnamon_stone-grossular","title":"HESSONITE, COYOTE FRONT RANGE Bishop, Bishop Mining District (Tungsten Hills Mining District), USA (miniature)","description":"\u003cp\u003e\u003cstrong\u003eHessonite\u003c\/strong\u003e, often referred to as \"cinnamon stone,\" is a prevalent type of grossular with the chemical formula Ca3Al2Si3O12. The term is derived from the Ancient Greek word ἣσσων (hēssōn), which translates to inferior, highlighting its comparatively lower hardness and density relative to other garnet varieties. This gemstone typically exhibits a distinctive red hue that can range towards orange or yellow, resembling zircon. Historical research by Sir Arthur Herbert Church revealed that many stones thought to be zircon were actually hessonite, with the two distinguishable by their specific gravities—hessonite's being between 3.64 and 3.69, while zircon's is approximately 4.6. Hessonite's hardness is similar to quartz, rated around 7 on the Mohs scale, whereas most garnet species are closer to 7.5. The primary sources of hessonite are Sri Lanka and India, where it is predominantly found in placer deposits, although it can also occur in its native matrix. Additional occurrences have been noted in Brazil and California.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"35 30 45 84","offer_id":49740012290324,"sku":"35 30 45 84","price":275.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250113_075139.jpg?v=1779192172"},{"product_id":"heulandite-1-crystals-rocks-minerals-crystals2collect","title":"HEULANDITE, LONAVALA, MAHARASTRA, INDIA (cabinet)","description":"\u003cp\u003e\u003cstrong\u003eHeulandite\u003c\/strong\u003e refers to a series of tecto-silicate minerals within the zeolite group. Until 1997, it was classified as a distinct mineral species; however, the International Mineralogical Association redefined it as a series name that includes specific mineral species such as Heulandite-Ca, Heulandite-Na, Heulandite-K, Heulandite-Sr, and Heulandite-Ba, the latter being 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, with minor sodium and potassium often substituting for calcium. In the heulandite-Sr variety, strontium takes the place of calcium. The designation of species is based on the predominant element, although they are visually indistinguishable, and the term heulandite is still applied when specific testing has not been conducted.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 40 90 251","offer_id":52538266026260,"sku":"100 40 90 251","price":240.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_3129.jpg?v=1779192179"},{"product_id":"heulandite-2-crystals-rocks-minerals-crystals2collect","title":"HEULANDITE, AURANGABAD, INDIA (miniature)","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":"55 40 40 54","offer_id":49740012355860,"sku":"55 40 40 54","price":155.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250219_134831.jpg?v=1779192222"},{"product_id":"heulandite-3-crystals-rocks-minerals-crystals2collect","title":"HEULANDITE, AURANGABAD, INDIA (cabinet)","description":"\u003cp\u003eHeulandite 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\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"100 60 80 120","offer_id":52538265993492,"sku":"100 60 80 120","price":295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/MIN_2921.jpg?v=1779192238"},{"product_id":"hiddenite-crystals-rocks-minerals-crystals2collect","title":"HIDDENITE, MINAS GERAIS, BRAZIL (miniature)","description":"\u003cp\u003e\u003cstrong\u003eHiddenite \u003c\/strong\u003eis a greenish (chromium) variety of spodumene, ranging from pale to emerald hues, and is occasionally utilized as a gemstone. The initial discoveries of hiddenite occurred around 1879 near White Plains, west of Stony Point in Alexander County, North Carolina. A local man named Lackey introduced these specimens to J.A.D. Stephenson, a mineral collector and merchant. Initially mistaken for gemmy diopside, the yellowish to greenish-yellow hiddenites caught the attention of exploration geologist William Earl Hidden, who was tasked by Thomas Edison to find platinum sources in North Carolina. Hidden forwarded samples to J. Lawrence Smith, a noted chemist and mineralogist, who accurately identified them as a spodumene variety and named it \"hiddenite\" in honor of Hidden. Subsequently, the area where these gemstones were discovered was renamed \"Hiddenite,\" and during the peak of hiddenite mining in the late 19th century, it was also referred to as \"lithia emerald.\"\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eSpodumene \u003c\/strong\u003eis a pyroxene mineral characterized as a lithium aluminum inosilicate, with the chemical formula LiAl(SiO3)2, making it a significant commercial source of lithium. This mineral can be found in various colors, including colorless, yellowish, purplish, or lilac forms known as kunzite, as well as yellowish-green or emerald-green varieties called hiddenite. Spodumene typically forms prismatic crystals, which can reach impressive sizes; notable examples include single crystals measuring up to 14.3 meters (47 feet) from the Black Hills in South Dakota, United States.\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"57.6 12.9 19.4  25","offer_id":49740012421396,"sku":"57.6 12.9 19.4  25","price":175.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250101_113631.jpg?v=1779192250"},{"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":"inesite-crystals-rocks-minerals-crystals2collect-pyrite-quartz","title":"INESITE, PYRITE, QUARTZ, FENGJIASHENG MINE, DAYE, HUBEI, PRC (LARGE CABINET)","description":"\u003cp\u003e\u003cstrong\u003e Inesite\u003c\/strong\u003e is a hydrous calcium manganese silicate mineral characterized by the chemical formula Ca2Mn7Si10O28(OH)2•5(H2O). This inosilicate mineral crystallizes in a triclinic system and exhibits a Mohs hardness ranging from 5.5 to 6, along with a specific gravity of 3.0. Its name is derived from the Greek word Ίνες (ines), meaning \"fibers,\" which reflects its distinctive color and habit. Inesite is typically found in hydrothermal replacement deposits associated with manganese-rich metamorphic rocks and serpentines. It was first identified in 1887 at the Hilfe Gottes Mine in Dillenburg, Hesse, Germany, and has since been located in several other significant sites.\u003cbr\u003e\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.\u003c\/p\u003e \u003cp\u003e \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"160 110 100 1803","offer_id":49740012749076,"sku":"160 110 100 1803","price":180.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250508_171619.jpg?v=1779192332"},{"product_id":"iolite-corierite-crystals-rocks-minerals-crystals2collect","title":"CORDIERITE, COROACI, MINAS GERAIS, BRAZIL (thumbnail)","description":"\u003cp\u003eCordierite, also known as iolite in gemology, is a cyclosilicate composed of magnesium, iron, and aluminum. It typically contains iron and exhibits a solid solution between magnesium-rich cordierite and iron-rich sekaninaite, represented by the series formula: (Mg,Fe)2Al3(Si5AlO18) to (Fe,Mg)2Al3(Si5AlO18). A high-temperature polymorph, indialite, shares a structure with beryl and features a random distribution of aluminum within the (Si,Al)6O18 rings. Cordierite is synthesized for high-temperature applications, including catalytic converters and pizza stones. \u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"15 2 11 50","offer_id":52539638907156,"sku":"15 2 11 50","price":355.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250320_134759.jpg?v=1779192368"},{"product_id":"kaemmererite-clinochlore-crystals-rocks-minerals-crystals2collect","title":"KÄMMERERITE, KOP KROM MINE, KOP DAG MOUNTAINS, ASKALE, TURKYE (Chromium bearing Clinochlore) (miniature)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKämmererite\u003c\/strong\u003e Mg\u003csub\u003e5\u003c\/sub\u003e(Al,Cr)\u003csub\u003e2\u003c\/sub\u003eSi\u003csub\u003e3\u003c\/sub\u003eO\u003csub\u003e10\u003c\/sub\u003e(OH)\u003csub\u003e8\u003c\/sub\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eKammererite is a chromian variety of Clinochlore which is a member of the Chlorite Group. Kammererite of this quality was found over three decades ago and is seldom seen for sale today.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eNamed in 1841 by Nils Gustaf Nordenskiöld in honor of August Alexander Kämmerer [1789 Artern, Saxony - February 3, 1858 St. Petersburg, Russia], the Ober-Bergmeister, chemist in the Mining Department of Russia. He was the author of several geological and pharmaceutical works.\u003c\/span\u003e\u003c\/p\u003e","brand":"Crystals2Collect A.C.N 651.525.727 Pty Ltd","offers":[{"title":"30 20 10 11","offer_id":49740012912916,"sku":"30 20 10 11","price":450.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/files\/20250425_153439.jpg?v=1779192375"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/2047\/9764\/collections\/DSC_0433_1cbdbfe2-27a1-4474-bfb1-bd71dd4b05f8.jpg?v=1769221826","url":"https:\/\/crystals2collect.com\/collections\/silicates-quartz.oembed?page=3","provider":"Crystals2Collect ","version":"1.0","type":"link"}