Rock Identifier

Category

Industrial Byproduct (Anthropogenic Rock)

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

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Basalt (with Brass Inlay) (Basalt (Mafic volcanic rock)) — igneous

Basalt (with Brass Inlay)

Basalt (Mafic volcanic rock)

Basalt (Weathered) (Extrusive mafic volcanic rock) — igneous

Basalt (Weathered)

Extrusive mafic volcanic rock

Basalt (Africite (Mafic Igneous Rock)) — igneous

Basalt

Africite (Mafic Igneous Rock)

Basalt River Cobble (Basalt (Mafic Igneous Rock)) — igneous

Basalt River Cobble

Basalt (Mafic Igneous Rock)

Basalt (Extrusive mafic volcanic rock) — igneous

Basalt

Extrusive mafic volcanic rock

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Basalt (River Pebble) (Extrusive mafic igneous rock) — igneous

Basalt (River Pebble)

Extrusive mafic igneous rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Mafic volcanic rock (Basalt)) — igneous

Basalt

Mafic volcanic rock (Basalt)

Basalt with Quartz/Plagioclase Inclusions (Mafic volcanic rock (Basaltic)) — igneous

Basalt with Quartz/Plagioclase Inclusions

Mafic volcanic rock (Basaltic)

Sandstone (likely Arkosic or Lithic Sandstone) (Sandstone (SiO2 predominant)) — sedimentary

Sandstone (likely Arkosic or Lithic Sandstone)

Sandstone (SiO2 predominant)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Granitoid (River Pebble) (Granite (primarily Quartz, Feldspar, and Mica)) — igneous

Granitoid (River Pebble)

Granite (primarily Quartz, Feldspar, and Mica)

Scoria (Lava Rock) (Extrusive Igneous Scoria (Vesicular Basalt)) — igneous

Scoria (Lava Rock)

Extrusive Igneous Scoria (Vesicular Basalt)

Granodiorite (Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)) — igneous

Granodiorite

Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Boulder Opal (Hydrated amorphous silica (SiO2·nH2O) in ironstone matrix) — mineral

Boulder Opal

Hydrated amorphous silica (SiO2·nH2O) in ironstone matrix

Quartz Vein on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Scoria (Lava Rock) (Scoria) — igneous

Scoria (Lava Rock)

Scoria

Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx') (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx')

Calcium Carbonate (CaCO3)

Clear/White Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Orca Agate (Blue Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Wood Paneling (Engineered Wood / Plywood Paneling) — not a rock

Wood Paneling

Engineered Wood / Plywood Paneling

Pink Tumbled Agate (Silicon Dioxide (SiO2) with dye) — mineral

Pink Tumbled Agate

Silicon Dioxide (SiO2) with dye

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Basalt River Cobble (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Vesicular Basalt (Scoria) (Basalt with vesicular texture) — igneous

Vesicular Basalt (Scoria)

Basalt with vesicular texture

Basalt Scoria (Aphanitic Vesicular Basalt) — igneous

Basalt Scoria

Aphanitic Vesicular Basalt

Sandstone (Ferruginous) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Garnet (Garnet group [X3Y2(SiO4)3]) — mineral

Garnet

Garnet group [X3Y2(SiO4)3]

Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Chalcedony (Agate/Carnelian variety) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Carnelian variety)

Cryptocrystalline Quartz (SiO2)

Black Tourmaline (Schorl (Sodium iron aluminum borosilicate), NaFe3Al6(BO3)3Si6O18(OH)4) — mineral

Black Tourmaline

Schorl (Sodium iron aluminum borosilicate), NaFe3Al6(BO3)3Si6O18(OH)4

Satin Spar (Selenite Gypsum Sphere) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (Selenite Gypsum Sphere)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Chert (often called Flint when dark or worked) (Cryptocrystalline silica (SiO2)) — sedimentary

Chert (often called Flint when dark or worked)

Cryptocrystalline silica (SiO2)

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide - SiO2)) — Mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide - SiO2)