Amethyst
Silicon Dioxide with iron impurities (SiO2)
Category
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
Amethyst
Silicon Dioxide with iron impurities (SiO2)
Amethyst
Amethyst (SiO2 - Silicon Dioxide with iron impurities)
Emerald (Tumbled Beryl)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
Yellow Quartz (Citrine-colored Quartz)
Silicon Dioxide (SiO2)
Amethyst Quartz Druse
Silicon Dioxide (SiO2) with iron impurities
Emerald
Beryl (Be3Al2Si6O18) with trace amounts of Chromium and/or Vanadium
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
Blue Spinel on Marble with Phlogopite
MgAl2O4 (Spinel) in CaCO3 (Calcite/Marble) matrix
Prase or Green Quartz
Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)
Quartz (Amethyst variety)
Silicon Dioxide (SiO2)
Pallasite Meteorite (Sliced and Polished)
Pallasite (Iron-Nickel Matrix with Olivine crystals)
Amethyst (Chevron/Banded Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Dragon Vein Agate
Chalcedony (Quartz) - SiO2
Amethyst (Chevron or Dream Amethyst variety)
Tectosilicate Silicon Dioxide (SiO2) with iron impurities
Smoky Quartz
Silicon Dioxide (SiO2)
Jasper (Red)
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2)
Amethyst
Silicon dioxide (SiO2)
Pyrite
Pyrite (Iron Disulfide), FeS2
Aquamarine on Feldspar Matrix
Beryl (Be3Al2Si6O18) with Potassium Feldspar (KAlSi3O8)
Chalcopyrite
Chalcopyrite (CuFeS2)
Amber
Succinite (organic hydrocarbon)
Amethyst Quartz (Amethyst Geode)
Silicon Dioxide (SiO2) with iron impurities
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
Amethyst (Quartz)
Amethyst (SiO2 with iron impurities)
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Pegmatite
Granitic Pegmatite
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Libyan Desert Glass
Impactite silica glass (SiO2)
Rough Diamond
Diamond (pure Carbon, C)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Chrysocolla on Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
Peridot in Basalt/Xenolith
Olivine (Mg, Fe)2SiO4 in Vesicular Basalt
Corundum (Sapphire in Host Rock)
Corundum (Aluminum Oxide, Al2O3)
Carnelian
Carnelian Chalcedony (SiO2 with iron oxide impurities)
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities