Rock Identifier

Category

Industrial Byproduct (Anthropogenic Material)

Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.

Learn about Industrial Byproduct (Anthropogenic Material) in the encyclopedia

Adirondack Garnet

Adirondack Garnet

Peat

Almandine Garnet

Almandine Garnet

Dunite

Limonite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Orange Obsidian

Diamond

Metarhyolite

Chert (or potentially massive Quartz/Quartzite) (SiO2 (Silicon Dioxide)) — sedimentary (if chert) / metamorphic (if quartzite)

Chert (or potentially massive Quartz/Quartzite)

SiO2 (Silicon Dioxide)

sedimentary (if chert) / metamorphic (if quartzite)

Limestone and Quartz Gravel with Petrified Wood (Sedimentary gravel aggregate and fossilized wood) — sedimentary

Limestone and Quartz Gravel with Petrified Wood

Sedimentary gravel aggregate and fossilized wood

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Fossil Shark Tooth (Chondrichthyes (Class)) — fossil

Fossil Shark Tooth

Chondrichthyes (Class)

Black Onyx and Mother of Pearl (Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)) — mineral

Black Onyx and Mother of Pearl

Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Blue Goldstone (Man-made glass with crystalline copper/cobalt inclusions) — mineral

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Polished fossilized wood (likely petrified wood) (Silicified wood; commonly quartz (SiO₂) replacing wood tissue) — fossil

Polished fossilized wood (likely petrified wood)

Silicified wood; commonly quartz (SiO₂) replacing wood tissue

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Sapphire (Corundum (Al2O3)) — gemstone

Yellow Sapphire

Corundum (Al2O3)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Coal (Coal (Combustible sedimentary rock)) — sedimentary

Coal

Coal (Combustible sedimentary rock)

Yellow Sapphire (Corundum (Al2O3)) — gemstone

Yellow Sapphire

Corundum (Al2O3)

Pumice (Vesicular Felsic Extrusive Igneous Rock) — igneous

Pumice

Vesicular Felsic Extrusive Igneous Rock

Serpentine / Antigorite (Mg3Si2O5(OH)4 (Serpentine Group)) — metamorphic

Serpentine / Antigorite

Mg3Si2O5(OH)4 (Serpentine Group)

Serpentine (Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)) — metamorphic

Serpentine

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Garnet (Tumbled) (Almandine / Pyrope Garnet (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)) — mineral

Garnet (Tumbled)

Almandine / Pyrope Garnet (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Quartz Pebble (with Hematite Inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (with Hematite Inclusions)

Silicon Dioxide (SiO2)

Pegmatite with Quartz and Feldspar (Intrusive Igneous Rock) — igneous

Pegmatite with Quartz and Feldspar

Intrusive Igneous Rock

Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Garnet (Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)) — mineral

Garnet

Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)

Anthracite (Anthracite Coal (Carbon)) — sedimentary

Anthracite

Anthracite Coal (Carbon)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Pegmatite (Igneous Pegmatite) — igneous

Pegmatite

Igneous Pegmatite

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

Barite Rose (Barium Sulfate (BaSO4)) — mineral

Barite Rose

Barium Sulfate (BaSO4)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Limestone (Weathered) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Weathered)

Calcium Carbonate (CaCO3)

Serpentinite (Serpentinite (composed primarily of serpentine group minerals including antigorite, chrysotile, and lizardite)) — metamorphic

Serpentinite

Serpentinite (composed primarily of serpentine group minerals including antigorite, chrysotile, and lizardite)

Quartz with Iron Oxide (SiO2) — mineral

Quartz with Iron Oxide

SiO2

Coal (Carbonaceous sedimentary rock (C)) — sedimentary

Coal

Carbonaceous sedimentary rock (C)

Satin Spar (often sold as Selenite) (Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)) — mineral

Satin Spar (often sold as Selenite)

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Faceted Quartz (Rock Crystal) (Crystalline Silicon Dioxide (SiO2)) — gemstone

Faceted Quartz (Rock Crystal)

Crystalline Silicon Dioxide (SiO2)

Quartzite Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Cobble

Quartzite (primarily SiO2)

Rough Sapphire (possibly Yellow/Green Corundum) (Corundum (Al2O3)) — mineral

Rough Sapphire (possibly Yellow/Green Corundum)

Corundum (Al2O3)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Chert (Red Jasper variant) (Silicon dioxide (SiO2)) — sedimentary

Chert (Red Jasper variant)

Silicon dioxide (SiO2)

Diamond (Natural Diamond (Carbon, C)) — gemstone

Diamond

Natural Diamond (Carbon, C)