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

Fuchsite (K(Al,Cr)2(AlSi3)O10(OH)2) — mineral

Fuchsite

K(Al,Cr)2(AlSi3)O10(OH)2

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Basalt (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt

Basalt (Extrusive Mafic Igneous)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Basalt (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt

Basalt (Extrusive Mafic Igneous)

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Granite (Granite (Phaneritic Quartz-Feldspar rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar rock)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

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

Basalt

Basalt (Ma-Fe Silicate)

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Granite Pebble (Granite (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (Mafic volcanic rock (Primarily Plagioclase Feldspar and Pyroxene)) — Igneous

Basalt

Mafic volcanic rock (Primarily Plagioclase Feldspar and Pyroxene)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Unakite or Epidosite (Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)) — metamorphic

Unakite or Epidosite

Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)

Quartzite (Iron-stained) (Quartzite (SiO2 with Iron oxide inclusions)) — metamorphic

Quartzite (Iron-stained)

Quartzite (SiO2 with Iron oxide inclusions)

Basalt (Vesicular) (Vesicular Basalt) — igneous

Basalt (Vesicular)

Vesicular Basalt

Sandstone Pebble (Arenite (SiO2 dominated)) — sedimentary

Sandstone Pebble

Arenite (SiO2 dominated)

Shale fragment (Shale (Laminated Mudstone)) — sedimentary

Shale fragment

Shale (Laminated Mudstone)

Garnetiferous Pegmatite (Pegmatite with Almandine Garnet and Muscovite) — igneous

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Riverstone (Gray Basalt) (Basalt (Maier-type or generic)) — igneous

Riverstone (Gray Basalt)

Basalt (Maier-type or generic)

Fossiliferous Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Sedimentary Calcium Carbonate (CaCO3)

Khondalite (Garnet-Sillimanite-Graphite Gneiss) — metamorphic

Khondalite

Garnet-Sillimanite-Graphite Gneiss

Red Sandstone (Arenite (with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide)

Sandstone (Quartz-rich) (Arenite) — sedimentary

Sandstone (Quartz-rich)

Arenite

Granodiorite (Granodiorite (Intermediate intrusive igneous rock)) — igneous

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Red Sandstone (Arenite (primarily Quartz with Hematite cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Granite Water-Worn Pebble (Intermediate to Felsic Phaneritic Igneous Rock) — igneous

Granite Water-Worn Pebble

Intermediate to Felsic Phaneritic Igneous Rock

Porphyritic Basalt (Aphanitic-Porphyritic Basalt) — igneous

Porphyritic Basalt

Aphanitic-Porphyritic Basalt

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Basalt (Mafic Extrusive Igneous Rock) — igneous

Basalt

Mafic Extrusive Igneous Rock

Basalt (Basalt) — igneous

Basalt

Basalt

Granodiorite (River Rock / Cobble) (Granodiorite; Phaneritic intrusive igneous rock dominated by plagioclase, quartz, and hornblende/biotite) — igneous

Granodiorite (River Rock / Cobble)

Granodiorite; Phaneritic intrusive igneous rock dominated by plagioclase, quartz, and hornblende/biotite

Basalt (River Rock pebble) (Basalt (a mafic extrusive igneous rock)) — igneous

Basalt (River Rock pebble)

Basalt (a mafic extrusive igneous rock)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Basalt (Greenstone/Trap Rock) (Basalt (dominated by plagioclase feldspar and pyroxene)) — igneous

Basalt (Greenstone/Trap Rock)

Basalt (dominated by plagioclase feldspar and pyroxene)

Fossiliferous Limestone (Carbonate sedimentary rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Carbonate sedimentary rock (CaCO3)

Sandstone (Micaceous Sandstone) (Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)) — sedimentary

Sandstone (Micaceous Sandstone)

Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)

Sandstone (Micaceous) (Clastic Sedimentary Rock - Micaceous Litharenite (SiO2 principal)) — sedimentary

Sandstone (Micaceous)

Clastic Sedimentary Rock - Micaceous Litharenite (SiO2 principal)

Basalt (or similar Mafic Igneous Rock) (Basalt) — igneous

Basalt (or similar Mafic Igneous Rock)

Basalt