Sandstone
Arenite (composed primarily of SiO2)
Category
Browse sedimentary (jasper), mineral (aquamarine) specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (Fossiliferous)
Arenite / Clastic Sedimentary Rock
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
Sandstone
Arenite
Optical Calcite
Calcite (Calcium Carbonate, CaCO3)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Yellow Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Banded Calcite (often sold as Caribbean Calcite or Pink Calcite)
Calcium Carbonate (CaCO3)
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite point
Calcite (Calcium Carbonate, CaCO3)
Quartz Geode
Silicon Dioxide (SiO2)
White Marble
Recrystallized Calcite (CaCO3)
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Magnetite (Small Granule)
Magnetite (Fe3O4)
Turquoise (Rough)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
Hematite
Iron(III) oxide (Fe2O3)
Magnetite / Iron Ore
Magnetite (Fe3O4)
Orange Calcite
Calcium Carbonate (CaCO3)
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
Banded Flint (Chert)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Quartz Pebble (likely Chalcedony or Quartzite)
Silicon Dioxide (SiO2)
Psilomelane (Manganese Ore)
Psilomelane (Ba,H2O)2Mn5O10
Green Calcite
Calcium Carbonate (CaCO3)
Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Celestine (Celestite)
Strontium sulfate (SrSO4)
Hematite
Iron(III) oxide (Fe2O3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Coprolite
Coprolite
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Sandstone with Liesegang Rings
Arenite with Iron Oxide Concretions
Hematite
Hematite (Fe2O3)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment