Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
Opalite
Synthetic Glass (Simulated Moonstone/Opal)
Red Sandstone
Arenite (Fe2O3 enriched)
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Asphalt Pavement (with aggregate)
Asphalt concrete
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Black glassy fragment, likely obsidian or industrial glass
Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image
Opalite (likely man-made opalescent glass)
Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
Carborundum
Silicon Carbide (SiC)
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
Asphalt aggregate
Human-made bituminous asphalt containing crushed silicate rock aggregate
Limestone
Calcareous sedimentary rock (CaCO3)
Botryoidal chalcedony (likely agate/jasper variety)
Microcrystalline quartz, SiO₂
White pebbles (rock material not identifiable from the image)
Undetermined; the smooth, pale pieces could be quartz, quartzite, or another light-colored rock
Clear quartz crystal (likely)
Quartz, silicon dioxide (SiO₂)
Beach Pebble (Chalcedony / Chert)
Silicon Dioxide (SiO2)
Chalk
Calcium carbonate (CaCO3)
Slag (Industrial Glassy Byproduct)
Anthropogenic silicate byproduct (Slag)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Banded Chert (River Stone)
Silicon Dioxide (SiO2)
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Green sea glass (likely bottle glass)
Man-made soda-lime silicate glass; not a natural mineral
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
Banded Sandstone
Arenite with Liesegang banding
Dalmatian jasper
Porphyritic microcrystalline quartz-rich rock, commonly sold as Dalmatian jasper; spots are chiefly arfvedsonite/amphibole minerals, sometimes altered feldspar
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Paving-concrete aggregate with a rounded stone
Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock