Sandstone
Arenite
Category
Browse man made object (metalwork) specimens identified by the Rock Identifier community.
Sandstone
Arenite
Jasper
Silicon dioxide (SiO2) with impurities
Banded Iron Formation (BIF) / Iron Ore
Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)
Basalt River Pebble
Basalt (Aphanitic Mafic Igneous Rock)
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt / Oxidized Vesicular Basalt
Scoria
Scoria (a vesicular basalt or andesite)
Azurite–malachite-bearing copper ore
Azurite (Cu₃(CO₃)₂(OH)₂) with malachite (Cu₂CO₃(OH)₂), in a copper-rich host rock
Pink Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
Granite
Felsic intrusive igneous rock
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Quartz Vein in Rhyolite
Silicon Dioxide (SiO2) in extrusive igneous rock
Rough Amethyst Quartz
Silicon Dioxide with Iron impurities (SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Milky quartz
Quartz, silicon dioxide (SiO₂)
Agate and Chalcedony Beads
Cryptocrystalline Quartz (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Fluorite
Calcium Fluoride (CaF2)
Quartz
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Mixed Tumbled Quartz and Chlorite Quartz
Silicon Dioxide (SiO2) with inclusions
Greenstone
Greenschist (composed of chlorite, actinolite, and epidote)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Chert (Jasper variation)
Silicon dioxide (SiO2)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Chert (Flint Nodules)
Chert (Silicon Dioxide, SiO2)
Serpentinite
Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), commonly with magnetite and minor talc
Quartz (Milky or Smoky variant)
Silicon Dioxide (SiO2)
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Milky Quartz
Silicon Dioxide (SiO2)
Milky quartz (likely quartz-rich rock)
Quartz, silicon dioxide (SiO₂)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Yellow Sapphire
Corundum (Al2O3 with trace amounts of iron)
Basalt (River Stone)
Vesicular Basalt
Basalt (River Stone)
Extrusive mafic igneous rock
Pink Quartz (Inclusion-filled)
Silicon Dioxide (SiO2)
Granite
Felsic Plutonic Igneous Rock
Celestite
Celestine (SrSO4)
Quartz
Silicon Dioxide (SiO2)