Clear Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral pseudomorph specimens identified by the Rock Identifier community.
Clear Quartz
Silicon Dioxide (SiO2)
Amethyst (Faceted)
Silicon Dioxide with iron impurities (SiO2)
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2) with Bornite (Cu5FeS4) oxidation
Prehnite with Epidote
Prehnite (Ca2Al(AlSi3O10)(OH)2) with Epidote inclusions (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
Rose Quartz
Silicon Dioxide (SiO2) with trace Manganese, Titanium, or Iron
Ferruginous Quartz
Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)
Amazonite
Microcline (KAlSi3O8)
Azurite and Malachite
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)
Amethyst on Basalt
Silicon dioxide (SiO2) with trace Iron
Smoky Quartz
Silicon Dioxide (SiO2)
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Azurite and Malachite
Copper Carbonates: Cu3(CO3)2(OH)2 (Azurite) and Cu2CO3(OH)2 (Malachite)
Blue Quartz
Quartz (Silicon Dioxide) with inclusions, SiO2
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)3(OH))
Pink Spinel
Magnesium Aluminum Oxide (MgAl2O4)
Chondrite Meteorite
Ordinary Chondrite (L or H type)
Petrified Wood
Silicified Wood (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Quartz (Druzy/Crystalline)
Silicon Dioxide (SiO2)
Peacock Ore
Bornite (Cu5FeS4)
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Amethyst
Amethyst (SiO2 with Iron impurities)
Amazonite
Microcline (KAlSi3O8)
Amethyst (Geode Fragment)
Silicon Dioxide with iron impurities (SiO2)
Malachite and Azurite on Matrix
Cu2CO3(OH)2 (Malachite) / Cu3(CO3)2(OH)2 (Azurite)
Amethyst
Amethyst (Silicon Dioxide with iron impurities), SiO2
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Rough Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Tanzanite (Rough)
Blue Zoisite (Ca2Al3(SiO4)3(OH))
Peacock Ore
Bornite (Cu5FeS4) or Chalcopyrite treated with acid
Moonstone with Black Tourmaline
Feldspar (KAlSi3O8) with inclusions of Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Amazonite
Potassium aluminum silicate (KAlSi3O8)
Emerald in Matrix (Quartz/Calcite)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
Clear Quartz
Silicon dioxide (SiO2)
Stichtite in Serpentine (Atlantasite)
Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4
Clear Quartz
Silicon Dioxide (SiO2)
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3