Iron Gossan (Limonite/Goethite)
Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones
sedimentary
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Orange Calcite (Carved as a Horned Skull)
Calcium Carbonate (CaCO3)
mineral
Sandstone (Weathered Coastal Boulder)
Arenite (composed primarily of SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Red Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)
sedimentary
Arid Sandy Loam
Arenosols / Regosols
sedimentary
Satin Spar (Selenite Gypsum Sphere)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcopyrite ore
Chalcopyrite (CuFeS2)
mineral
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
metamorphic
Hematite
Hematite (Fe2O3)
mineral
Fluorite (Rainbow Fluorite Point)
Calcium Fluoride (CaF2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
Mineral
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (Iron Stone/Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
not a rock (anthropogenic material/technofossil)
Celestine (or Celestite)
Strontium sulfate (SrSO4)
mineral
Native Copper
Native Copper (Cu)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Chert (often colloquially called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Garnet Schist
Almandine-Garnet Mica Schist
metamorphic
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Vein in Sandstone
Sandstone with Hydrothermal Quartz (SiO2)
sedimentary
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Gray/Black Chert)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Jasper or Agate-bearing Chert
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary