Red Sandstone
Arenite (with Iron Oxide cement)
sedimentary
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Drupa or Druzy Quartz on Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Iron Concretion
Ferruginous concretion (Fe2O3·nH2O / FeO(OH))
sedimentary
Agate
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Yellow Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Optical Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Orange Calcite point
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Geode or Concretion
Silica-based Concretion / Quartz Geode
sedimentary
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Banded Calcite (often sold as Caribbean Calcite or Pink Calcite)
Calcium Carbonate (CaCO3)
mineral
Ironstone Concretion (Coprolite-like)
Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Botryoidal Lace Agate
Agate (Silicon Dioxide, SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Angelite
Anhydrous Calcium Sulfate (CaSO4)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Turquoise (Rough)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Banded Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Carnelian Agate
Carnelian (Chalcedony / Silicon Dioxide SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Psilomelane (Manganese Ore)
Psilomelane (Ba,H2O)2Mn5O10
mineral