Gneiss
Gneiss
metamorphic
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Amber
Amber (C10H16O)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Travertine
Terrestrial Sedimentary Rock (CaCO3)
sedimentary
Gneiss
Gneiss
metamorphic
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Hematite / Goethite (Iron Ore)
Iron Oxide (Fe2O3 / FeO(OH))
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Opal
Hydrated amorphous form of silica (SiO2·nH2O)
mineral
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pink Dyed Agate
Silicon Dioxide (SiO2) with synthetic pigment
mineral
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Quartz (Grain/Fragment)
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Quartz (specifically Milky or Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Titanium-Coated Hematite (Aura Hematite)
Titanium-bonded Hematite (Fe2O3 with a Ti coating)
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral
Fancy Jasper
Silicon Dioxide (SiO2)
mineral
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Shale
Shale (comprised mostly of clay minerals and quartz)
sedimentary
Quartz
Silicon dioxide (SiO2)
Mineral
Banded Gneiss
Gneiss
metamorphic
Red Jasper
Quartz (Silicon Dioxide) with Hematite inclusions, SiO2
mineral
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Sandstone (specifically Red Sandstone)
Arenite (primarily Quartz, SiO2)
sedimentary