Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Metamorphic, Sedimentary
Browse igneous, metamorphic, sedimentary specimens identified by the Rock Identifier community.
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Clear Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear Fragment)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz-rich rock, likely milky quartz vein material
Mostly quartz (SiO₂); exact rock type cannot be determined from the image alone
mineral
Quartz (likely milky/rose quartz variety)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Dark rounded pebble
Likely basalt or another fine-grained mafic volcanic rock; exact identification is uncertain from the image
igneous
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz with Iron Staining
SiO2 with Fe oxide impurities
mineral
Quartz
SiO2 (Silicon Dioxide)
mineral
Unidentified small rock fragment
Likely quartz-rich material; exact identification is indeterminate from the image
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
White Agate / Chalcedony
Silicon Dioxide (SiO2)
gemstone
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Rose or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Beach Pebble (Quartz / Quartzite)
Silicon Dioxide (SiO2)
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Quartz (Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral