Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Amethyst
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Jasper and Agate (Polished Pebble)
Chalcedony (SiO2 with impurities)
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Jasper with Quartz inclusions
Silicon Dioxide (SiO2) with varying mineral impurities
Black Onyx
Onyx (Silicon Dioxide, SiO2)
Black Onyx (Tumbled)
Silicon Dioxide (SiO2)
Snakeskin Agate
Agate (Cryptocrystalline Quartz, SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
Greywacke
Dirty Sandstone (Lithic wacke)
Quartz
Quartz (SiO₂)
Jasper with Quartz
Silicon Dioxide (SiO2) - Chalcedony variety
Sunstone
Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8
Amethyst (Rough Crystal)
Silicon Dioxide (SiO2 with ferric iron impurities)
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
Amazonite
Amazonite (KAlSi3O8)
Citrine (Heat-treated or Natural Quartz)
Silicon Dioxide (SiO2)
Citrine
Quartz (Silicon Dioxide - SiO2)
Amethyst
Amethyst (SiO2 with iron impurities)
Amazonite
K(AlSi3O8) - Microcline variant
Moldavite
Moldavite (Siliceous vitreous substance)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Amazonite
Potassium aluminum silicate (Microcline); KAlSi3O8
Amazonite (or Amazon Stone)
Potassium Feldspar (Microcline), K(AlSi3O8)
Clear Quartz
SiO2 (Silicon Dioxide)
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
Amazonite
Microcline (Amazonstone), K(AlSi3O8)
Kimberlite
Kimberlite
Blue Calcite
Calcium Carbonate (CaCO3)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz (on matrix)
Quartz (Silicon Dioxide, SiO₂)
Chert (Polished Gemstone / River Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)