Quartz (possibly Citrine or Smoky Quartz variety)
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Sedimentary, And Metamorphic
Browse igneous, sedimentary, and metamorphic specimens identified by the Rock Identifier community.
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Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sunstone
Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky to Clear)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz / Chalcedony
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Mica (likely Muscovite)
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Serpentine
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
Lapis Lazuli
Lapis Lazuli (Metamorphic Rock containing Lazurite, Calcite, Pyrite, and Sodalite)
metamorphic
Gravel Pebble (Likely Quartzite or Basalt)
Quartzite (or Macrocrystalline Quartz)
metamorphic
Painted River Rock (likely Quartzite or Granite)
Quartzite or Granitic Gneiss (painted)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Greenstone / Greenschist
Greenschist (composed of chlorite, epidote, and actinolite)
metamorphic
Greenstone
Greenschist
metamorphic
Quartz Vein in Gneiss/Granite
Silicon Dioxide (SiO2) in Feldspar-Quartz Gneiss host rock
metamorphic
Epidotite
Epidotite (Epidote content > 50%)
metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)
metamorphic
Rainbow Hematite (Man-made/Treated)
Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)
mineral
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Mineral
Greenstone / Greenschist
Greenschist (containing Chlorite, Epidote, Actinolite)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Epidote in Matrix (Dragon Stone variant)
Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Red Jasper
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite)
Metamorphic rock
Green Calcite
Calcite (CaCO3)
mineral
Greenstone
Metabasalts and metavolcanics
metamorphic
Mica Schist (Greenschist / Chlorite Schist)
Schist (rich in Muscovite, Chlorite, and Quartz)
metamorphic
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Epidote (Greenstone)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Greenstone
Chlorite schist or metabasalt depending on specific composition
Metamorphic
Nephrite Jade
Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral