Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
Moonstone (Feldspar)
Orthoclase or Oligoclase (KAlSi3O8)
mineral
Quartz Geode
Quartz (Silicon Dioxide, SiO2) Geode
sedimentary
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Moonstone (Tumbled)
Orthoclase Feldspar (KAlSi3O8) with inclusions of Albite
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Amethyst (Geode/Druzy)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Sunstone
Oligoclase (Feldspar variety), (Na,Ca)(Si,Al)4O8
mineral
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·n(H2O)
mineral
Quartz (with inclusions / Sandstone fragment)
Silicon Dioxide (SiO2)
mineral
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Chrysocolla in Quartz (Quantum Quattro variant)
Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2
mineral
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
mineral
Amazonite
Microcline (KAlSi3O8) with Trace Elements
mineral
Amethyst (Quartz)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Larimar
Pectolite (NaCa2Si3O8(OH))
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Zoisite with Ruby (Anyolite)
Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)
metamorphic
Amethyst (Polished Cabochon)
Silicon Dioxide (SiO2) with iron impurities
mineral
Copper Ore with Chrysocolla and Azurite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Amazonite
K(AlSi3O8), Microcline
mineral
Amazonite
Amazonite (KAlSi3O8)
mineral
Peacock Ore (Chalcopyrite/Bornite)
Bornite (Cu5FeS4) or iridescent treated Chalcopyrite (CuFeS2)
Mineral
Amethyst (Quartz variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Gold Ore in Quartz
Auriferous Quartz (Gold: Au; Quartz: SiO2)
Mineral
Amazonite (with smoky quartz/feldspar inclusions)
K(AlSi3O8), Microcline (Tectosilicate)
mineral
Caribbean Calcite
Calcium Carbonate with Aragonite (CaCO3)
mineral
Amethyst
Silicon dioxide / Quartz (SiO2+Fe4+)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Zoisite with Ruby / Anyolite
Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)
metamorphic
Limonite/Goethite Gossan
FeO(OH)·nH2O (Hydrated iron oxide)
mineral
Chalcedony with Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral