Rock Identifier

Category

Rock

Browse rock specimens identified by the Rock Identifier community.

Learn about Rock in the encyclopedia

Rock Gypsum

Coral Rock

Asphalt Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Anorthosite

Cataclasite

Peridotite

Phosphorite

Gondite

Dunite

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Honeycomb Coral Fossil (Favosites (extinct genus of tabulate coral)) — sedimentary

Honeycomb Coral Fossil

Favosites (extinct genus of tabulate coral)

Geode or Concretion (Silica-rich Concretion or Unopened Geode (SiO2)) — sedimentary

Geode or Concretion

Silica-rich Concretion or Unopened Geode (SiO2)

Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

River Stone (Chalcedony/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

River Stone (Chalcedony/Jasper variety)

Microcrystalline Quartz (SiO2)

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Eclogite (Eclogite (omphacite-garnet rock)) — metamorphic

Eclogite

Eclogite (omphacite-garnet rock)

Wishing Stone (Greenschist or Basalt with Quartz/Calcite Vein) — metamorphic

Wishing Stone

Greenschist or Basalt with Quartz/Calcite Vein

Granite (with alteration) (Granite (Felsic intrusive igneous rock)) — igneous

Granite (with alteration)

Granite (Felsic intrusive igneous rock)

Scoria (Lava Rock) (Scoria (Vesicular Basaltic Rock)) — Igneous

Scoria (Lava Rock)

Scoria (Vesicular Basaltic Rock)

Scoria (Lava Rock) (Mafic Vesicular Volcanic Rock) — igneous

Scoria (Lava Rock)

Mafic Vesicular Volcanic Rock

Scoria (Lava Rock) (Scoria (Mafic Volcanic Rock)) — igneous

Scoria (Lava Rock)

Scoria (Mafic Volcanic Rock)

Lava Rock (Scoria) (Scoria (Mafic volcanic rock)) — igneous

Lava Rock (Scoria)

Scoria (Mafic volcanic rock)

Lava Rock (Basalt) (Basalt (extrusive igneous rock)) — igneous

Lava Rock (Basalt)

Basalt (extrusive igneous rock)

Scoria (Lava Rock) (Scoria (vesicular basaltic rock)) — igneous

Scoria (Lava Rock)

Scoria (vesicular basaltic rock)

Mica Schist (Mica Schist (contains muscovite/biotite, quartz, plagioclase)) — metamorphic

Mica Schist

Mica Schist (contains muscovite/biotite, quartz, plagioclase)

Basalt (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt

Basalt (Extrusive Mafic Igneous)

Sandstone (Sandstone (Quartzose/Feldspathic Sandstone)) — sedimentary

Sandstone

Sandstone (Quartzose/Feldspathic Sandstone)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

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

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Milky Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (River Cobble) (Sandstone (composed predominantly of SiO2 - Quartz)) — sedimentary

Sandstone (River Cobble)

Sandstone (composed predominantly of SiO2 - Quartz)

Sandstone (Arkose/Quartzose) (Arenite (SiO2 based clastic rock)) — sedimentary

Sandstone (Arkose/Quartzose)

Arenite (SiO2 based clastic rock)

Basalt (Vesicular) (Basalt) — igneous

Basalt (Vesicular)

Basalt

Amethyst (Amethyst (Silicon Dioxide, SiO2 with Iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Porphyritic Basalt (Basalt (with plagioclase phenocrysts)) — igneous

Porphyritic Basalt

Basalt (with plagioclase phenocrysts)

Gneiss Pebble (Gneiss (Metamorphic Foliated Rock)) — metamorphic

Gneiss Pebble

Gneiss (Metamorphic Foliated Rock)

River Cobble (Quartz-rich Sandstone) (Arenite with iron oxide staining) — sedimentary

River Cobble (Quartz-rich Sandstone)

Arenite with iron oxide staining

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

River Pebble (Likely Quartzite or Chert) (Quartzite (primarily SiO2)) — metamorphic

River Pebble (Likely Quartzite or Chert)

Quartzite (primarily SiO2)

Sandstone (Arenite (specifically Quartz Arenite)) — sedimentary

Sandstone

Arenite (specifically Quartz Arenite)

Basalt Pebble (Mafic Extrusive Igneous Rock) — igneous

Basalt Pebble

Mafic Extrusive Igneous Rock

Granite Pebble (Granite (Phaneritic Igneous Rock)) — igneous

Granite Pebble

Granite (Phaneritic Igneous Rock)

Basalt River Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt River Pebble

Basalt (Mafic volcanic rock)

Pink Granite (Phaneritic Felsic Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock

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

Porphyritic Basalt

Basalt (Extrusive Igneous Rock)

Basalt (Basalt (extrusive volcanic rock)) — igneous

Basalt

Basalt (extrusive volcanic rock)