Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Category
Browse sedimentary or igneous specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Weathered sandstone (probable arkosic sandstone)
Clastic sandstone, mainly quartz (SiO₂) with feldspar and iron-oxide cement
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
Quartz
SiO2 (Silicon Dioxide)
Quartz
Silicon dioxide (SiO2)
Quartz
SiO2 (Silicon Dioxide)
Clear Quartz
Silicon Dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Quartz Crystal Cluster / Quartzite
Silicon Dioxide (SiO2)
Quartz (Orange/Pink variety)
Silicon Dioxide (SiO2)
Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Clear Quartz (Faceted)
Silicon Dioxide (SiO2)
Clear Quartz (Cut/Faceted Gemstone)
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine Quartz / Milky Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Boulder
Silicon Dioxide (SiO2)
Mica (Muscovite or Biotite)
Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)
Quartz Crystal
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (Chalcedony), SiO2
Quartz with Matrix
Silicon Dioxide (SiO2)
Tumbled Quartz
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (Chalcedony), SiO2
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
Pyrite
Iron Sulfide (FeS2)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
Magnetite (Lodestone)
Iron(II,III) oxide (Fe3O4)
Dalmatian Stone
Dalmatian Jasper (a trade name for an igneous microcrystalline rock composed mostly of feldspar, quartz, and dravite)
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
Pyrite
Iron sulfide (FeS2)