Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Category
Mineral, Jewelry
Browse mineral, jewelry specimens identified by the Rock Identifier community.
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Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Citrine (Heat-treated or Natural Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Citrine or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Citrine
Quartz (Silicon Dioxide - SiO2)
mineral
Chrysocolla in Quartz (Gem Silica)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Oceanside Agate (Orbicular Agate)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Quartz (Clear/White)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Chert/Chaldcedony)
Silicon Dioxide (SiO₂)
mineral
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (SiO2 with iron impurities)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Amazonite
Potassium aluminum silicate (Microcline); KAlSi3O8
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
metamorphic
Amazonite
Microcline (KAlSi3O8)
mineral
Amethyst (Rose de France)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Thunderegg (specifically a Jasper/Agate-filled Geode nodule)
Silicon Dioxide (SiO2) within Rhyolitic Matrix
igneous
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
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz (Clear/Milky)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz (Crystal)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Quartz Crystal (Amethyst)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
mineral
Amazonite
Microcline (Amazonstone), K(AlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Agate Geode
Chalcedony (cryptocrystalline SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Inclusion Quartz (Garden Quartz)
Silicon Dioxide (SiO2) with inclusions (e.g., Chlorite, Hematite)
mineral