Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous
Browse sedimentary and igneous specimens identified by the Rock Identifier community.
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Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Weathered sandstone (probable arkosic sandstone)
Clastic sandstone, mainly quartz (SiO₂) with feldspar and iron-oxide cement
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Mica
Phyllosilicate group (e.g., Biotite or Muscovite)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Citrine
Silicon dioxide (Quartz variety), SiO2
gemstone
Quartz
Silicon dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral