Chert (Cherty Flint/Jasper variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Category
Organic Gemstone (Not A Mineral)
Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.
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Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (variety of Microcline)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
gemstone
Chrysocolla
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Amazonite
Amazonite (KAlSi3O8)
mineral
Chrysocolla (in Host Rock)
Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Aquamarine (Beryl)
Beryl (Be3Al2Si6O18 with Fe impurities)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Sunstone
Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8
mineral
Emerald
Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst (Rough Crystal)
Silicon Dioxide (SiO2 with ferric iron impurities)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Boulder Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8) with inclusions of Albite
mineral
Amazonite
Amazonite (KAlSi3O8)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Amazonite
Amazonite (KAlSi3O8)
mineral
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Citrine (Heat-treated or Natural Quartz)
Silicon Dioxide (SiO2)
mineral
Citrine
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (SiO2 with iron impurities)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Amazonite
Potassium aluminum silicate (Microcline); KAlSi3O8
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Moldavite
Moldavite (Siliceous vitreous substance)
tektite (natural glass)
Amazonite (or Amazon Stone)
Potassium Feldspar (Microcline), K(AlSi3O8)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Quartz (Clear/Milky)
Silicon Dioxide (SiO2)
mineral
Chrysocolla on Matrix
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral