Rock Identifier

Category

Not A Rock (Man Made Polymer)

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

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

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Map Jasper

Goldstone

Anorthosite

Gondite

Dunite

Basalt (Basalt (dominated by plagioclase feldspar and pyroxene)) — igneous

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Basalt (Basalt (Ma-Fe Silicate)) — igneous

Basalt

Basalt (Ma-Fe Silicate)

Diorite (River Cobble) (Intermediate plutonic igneous rock) — igneous

Diorite (River Cobble)

Intermediate plutonic igneous rock

Shale (Argillaceous sedimentary rock) — sedimentary

Shale

Argillaceous sedimentary rock

Rock Crystal Quartz (Silicon Dioxide (SiO2)) — mineral

Rock Crystal Quartz

Silicon Dioxide (SiO2)

Biotite–quartz–feldspar gneiss (Gneiss, composed chiefly of quartz (SiO₂), feldspar, and dark mica, likely biotite) — metamorphic

Biotite–quartz–feldspar gneiss

Gneiss, composed chiefly of quartz (SiO₂), feldspar, and dark mica, likely biotite

Peridotite (Olivine Rock) (Peridotite (composed largely of olivine, (Mg, Fe)2SiO4)) — igneous

Peridotite (Olivine Rock)

Peridotite (composed largely of olivine, (Mg, Fe)2SiO4)

Black basalt (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and commonly olivine) — igneous

Black basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and commonly olivine

Basalt (Extrusive Igneous Basalt (contains Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Extrusive Igneous Basalt (contains Plagioclase Feldspar and Pyroxene)

Quartz Vein Rock with Feldspar (Silicon Dioxide (SiO2) with Potassium Feldspar) — mineral

Quartz Vein Rock with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Sandstone (Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)) — Sedimentary

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Sandstone (Sandstone (various mineral compositions)) — Sedimentary

Sandstone

Sandstone (various mineral compositions)

Rounded weathered rock, likely basalt or andesite (Fine-grained mafic to intermediate volcanic rock; precise identification requires testing) — igneous

Rounded weathered rock, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; precise identification requires testing

Black Onyx (Chalcedony (SiO2)) — gemstone

Black Onyx

Chalcedony (SiO2)

Black Tourmaline (Tumbled) (Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)) — mineral

Black Tourmaline (Tumbled)

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Amethyst (Amethyst (SiO2 with Iron impurities)) — mineral

Amethyst

Amethyst (SiO2 with Iron impurities)

Conglomerate (Polymictic clast-supported conglomerate, likely ferruginous) — sedimentary

Conglomerate

Polymictic clast-supported conglomerate, likely ferruginous

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

Amethyst Quartz Druse

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (lithic wacke/conglomerate mix) (Clastic Sedimentary Rock (SiO2 with lithic fragments)) — sedimentary

Sandstone (lithic wacke/conglomerate mix)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Porphyritic Andesite (Andesite with Hornblende phenocrysts) — igneous

Porphyritic Andesite

Andesite with Hornblende phenocrysts

Basalt Pebble (Mafic Extrusive Igneous Rock) — igneous

Basalt Pebble

Mafic Extrusive Igneous Rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Sandstone (Arenite (primarily Quartz and Feldspar)) — sedimentary

Sandstone

Arenite (primarily Quartz and Feldspar)

Granite (Granite (felsic intrusive igneous rock)) — igneous

Granite

Granite (felsic intrusive igneous rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Chalcedony (Blue Dragon/Gray Chalcedony) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Blue Dragon/Gray Chalcedony)

Silicon Dioxide (SiO₂)

Chert (or potentially Jasper/Chalcedony) (SiO2 (Silicon Dioxide)) — sedimentary

Chert (or potentially Jasper/Chalcedony)

SiO2 (Silicon Dioxide)

Serpentine (Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Schist (Schist) — Metamorphic

Schist

Schist

Unable to identify - Image contains non-geological items — N/A

Unable to identify - Image contains non-geological items

Sandstone or Weathered Conglomerate (Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)) — sedimentary

Sandstone or Weathered Conglomerate

Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

Sandstone (River Rock) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

River Stone (Quartzite/Chert mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

River Stone (Quartzite/Chert mixture)

Microcrystalline Quartz (SiO2)

Sandstone with Manganese Dendrites (Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)) — sedimentary

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Fossil Coral (Rugose Coral / Hexagonaria (CaCO3)) — fossil

Fossil Coral

Rugose Coral / Hexagonaria (CaCO3)

Asphalt (Bituminous Pavement Bit) (Bitumen-bound aggregate (Petrochemical-bound composite)) — sedimentary (anthropogenic/technogenic)

Asphalt (Bituminous Pavement Bit)

Bitumen-bound aggregate (Petrochemical-bound composite)

sedimentary (anthropogenic/technogenic)

Rock Salt (Halite (NaCl)) — mineral

Rock Salt

Halite (NaCl)