Rock Identifier

Category

Not A Natural Rock (Man Made Composite)

Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.

Learn about Not A Natural Rock (Man Made Composite) in the encyclopedia

Asphalt Rock

Rock Gypsum

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Chalk

Goldstone

Anorthosite

Albitite

Dunite

Gondite

Limestone

Coquina

Granite Pebble (Phaneritic intrusive igneous rock) — igneous

Granite Pebble

Phaneritic intrusive igneous rock

Sandstone (Ferruginous) (Ferruginous Sandstone (SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Painted Garden Rock (Coated Siltstone or Mudstone) — sedimentary

Painted Garden Rock

Coated Siltstone or Mudstone

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Bituminous Coal (with Anthracite or Vitrinite inclusion) (Organic-rich Sedimentary Rock (Carboniferous classification)) — sedimentary

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

River Rock (Siliciclastic rock (water-worn pebble)) — sedimentary

River Rock

Siliciclastic rock (water-worn pebble)

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

Basalt Pebble

Basalt (Mafic Extrusive Igneous Rock)

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Pink Granite (Alkali-feldspar Granite) (Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)) — igneous

Pink Granite (Alkali-feldspar Granite)

Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)

Bauxite (Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))) — sedimentary

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))

Dyed Agate (Tumbled) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dyed Agate (Agate (Silicon dioxide)) — Mineral

Dyed Agate

Agate (Silicon dioxide)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst (Silicon dioxide (SiO2)) — mineral

Amethyst

Silicon dioxide (SiO2)

River Cobble (Quartzite / Porphyritic Igneous Rock) (Siliceous rock / Water-worn lithic fragment) — igneous

River Cobble (Quartzite / Porphyritic Igneous Rock)

Siliceous rock / Water-worn lithic fragment

Basalt Scoria (Aphanitic basaltic scoria) — igneous

Basalt Scoria

Aphanitic basaltic scoria

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone (Arenite (clastic sedimentary rock)) — sedimentary

Sandstone

Arenite (clastic sedimentary rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

River Cobble (Quartzite) (Meta-orthoquartzite) — metamorphic

River Cobble (Quartzite)

Meta-orthoquartzite

Sandstone (Quartzose) (Sandstone (clastic sedimentary rock, primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Sandstone (clastic sedimentary rock, primarily SiO2)

Sandstone (likely Arkosic) (Arenite (SiO2 with KAlSi3O8)) — sedimentary

Sandstone (likely Arkosic)

Arenite (SiO2 with KAlSi3O8)

Breccia (Breccia) — sedimentary

Breccia

Breccia

Quartz Pebble / River Siltstone (Silicon Dioxide (SiO2) / Fine-grained Sedimentary Rock) — sedimentary

Quartz Pebble / River Siltstone

Silicon Dioxide (SiO2) / Fine-grained Sedimentary Rock

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Shale or Mudstone (Argillaceous sedimentary rock) — sedimentary

Shale or Mudstone

Argillaceous sedimentary rock

River Pebble (Basalt or fine-grained Quartzite) (Fine-grained Mafic Rock (Volcanic Basalt)) — igneous

River Pebble (Basalt or fine-grained Quartzite)

Fine-grained Mafic Rock (Volcanic Basalt)

Sandstone (Sandstone (composed mainly of Quartz, SiO2, and Feldspar)) — sedimentary

Sandstone

Sandstone (composed mainly of Quartz, SiO2, and Feldspar)

Shale with Vein Infillings (Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.) — Sedimentary Rock

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Sedimentary Rock

Quartzite Pebble (Stream-rounded Quartz/Quartzite Gravel) (Quartzite / Silicon Dioxide (SiO2)) — metamorphic

Quartzite Pebble (Stream-rounded Quartz/Quartzite Gravel)

Quartzite / Silicon Dioxide (SiO2)

Slate (Foliated metamorphic rock) — metamorphic

Slate

Foliated metamorphic rock

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Cullet Glass (Industrial Slag Glass) (Amorphous Silica (SiO2) with metallic oxide impurities) — Man-made byproduct (often mistaken for Obsidian or Emerald)

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Man-made byproduct (often mistaken for Obsidian or Emerald)

Bandit Heart Pebble (Quartz-Veined Sedimentary Rock) (Quartz-veined siltstone or sandstone) — sedimentary

Bandit Heart Pebble (Quartz-Veined Sedimentary Rock)

Quartz-veined siltstone or sandstone

Quartz Sandstone Pebble (Sandstone (SiO2 dominated)) — sedimentary

Quartz Sandstone Pebble

Sandstone (SiO2 dominated)

Shale / Mudstone (Sedimentary rock (Claystone / Mudstone / Shale)) — sedimentary

Shale / Mudstone

Sedimentary rock (Claystone / Mudstone / Shale)

Rough turquoise-bearing rock (probable turquoise matrix) (Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a host-rock matrix) — mineral

Rough turquoise-bearing rock (probable turquoise matrix)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a host-rock matrix

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Hag Stone (Perforated Flint or Chert (SiO2)) — sedimentary

Hag Stone

Perforated Flint or Chert (SiO2)

Sandstone (Arenite (typically SiO2 based)) — sedimentary

Sandstone

Arenite (typically SiO2 based)