Pyrite
Iron Sulfide (FeS2)
mineral
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
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Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Mudstone
Argillite
sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Bituminous Coal
Humic coal (Carboniferous fossil fuel)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock
sedimentary
Red Sandstone
Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)
sedimentary
Sandstone (Greywacke)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Jasper
Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Manhattan Schist
Manhattan Schist (Aluminous Metasedimentary Rock)
metamorphic
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
mineral
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Fluorite Geode
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Barite Rose
Barium Sulfate (BaSO4)
mineral
Fossiliferous Limestone with Crinoid Stem
Bioclastic Limestone (CaCO3)
sedimentary
Barite
Barium Sulfate (BaSO4)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Halite (Rock Salt)
Halite (NaCl)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Shiva Lingam Stone
Cryptocrystalline Quartz (Jasper/Basalt matrix)
sedimentary
Chert
Chert (SiO2, Silicon Dioxide)
sedimentary
Black Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite/Ironstone
Limonite (Hydrous ferric oxides), FeO(OH)·nH2O
sedimentary
Tumbled honey calcite (likely aragonite/calcite material)
Calcite, CaCO₃; possibly aragonite, a polymorph of CaCO₃
mineral
Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)
Quartz–feldspar–mica rock; exact identification requires testing
metamorphic