Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Sedimentary, Metamorphic, Mineral
Browse igneous, sedimentary, metamorphic, mineral specimens identified by the Rock Identifier community.
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Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Raw selenite (gypsum)
Gypsum, CaSO₄·2H₂O; translucent variety selenite
mineral
Gneiss (Metamorphosed Granitic Rock)
Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)
metamorphic
Quartz (Raw / Unpolished)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral
Pyrite in Matrix (likely Quartz or Schist matrix)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Foliated metamorphic rock, likely gneiss or mica schist
Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
metamorphic
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic
Quartz (Milky/Clear Variety)
Silicon Dioxide (SiO2)
mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral