Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Mineral (Synthetic)
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
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Amazonite
Amazonite (KAlSi3O8)
mineral
Citrine
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Citrine or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Limonite Pseudomorph after Pyrite
Goethite/Limonite FeO(OH)·nH2O replacing Pyrite FeS2
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Oceanside Agate (Orbicular Agate)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Citrine (Heat-treated or Natural Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Clear/White)
Silicon Dioxide (SiO2)
mineral
Boulder Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Amazonite
Amazonite (KAlSi3O8)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (Chert/Chaldcedony)
Silicon Dioxide (SiO₂)
mineral
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
metamorphic
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Chrysocolla in Quartz (Gem Silica)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (SiO2 with iron impurities)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
Amazonite
Potassium aluminum silicate (Microcline); KAlSi3O8
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Moldavite
Moldavite (Siliceous vitreous substance)
tektite (natural glass)
Amazonite
Microcline (KAlSi3O8)
mineral
Amethyst (Rose de France)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Amazonite (or Amazon Stone)
Potassium Feldspar (Microcline), K(AlSi3O8)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz Crystal (Amethyst)
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
mineral
Orthoceratid Fossil in Limestone
Orthoceras (extinct genus of Nautiloid Cephalopod)
sedimentary
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