Rock Identifier

Category

Not A Rock

Browse not a rock specimens identified by the Rock Identifier community.

Learn about Not A Rock in the encyclopedia

Rock Gypsum

Rock Gypsum

Rock Salt

Rock Salt

Coral Rock

Coral Rock

Asphalt Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Cataclasite

Cataclasite

Anorthosite

Anorthosite

Gondite

Gondite

Peridotite

Peridotite

Epidosite

Epidosite

Phosphorite

Phosphorite

Basalt (Basaltic Mafic Rock) — igneous

Basalt

Basaltic Mafic Rock

Basalt (Mafic volcanic rock) — igneous

Basalt

Mafic volcanic rock

River Pebble (Greywacke or Siltstone) (Clastic Sedimentary Rock) — sedimentary

River Pebble (Greywacke or Siltstone)

Clastic Sedimentary Rock

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Coal (Bituminous) (Sedimentary carbonaceous rock) — sedimentary

Coal (Bituminous)

Sedimentary carbonaceous rock

Volcanic Tuff (Breccia) (Pyroclastic Tuffaceous Rock) — igneous

Volcanic Tuff (Breccia)

Pyroclastic Tuffaceous Rock

Slate (Foliated metamorphic rock) — metamorphic

Slate

Foliated metamorphic rock

Granite (Felsic Plutonic Rock) — igneous

Granite

Felsic Plutonic Rock

Basalt River Stone (Basaltic Igneous Rock) — igneous

Basalt River Stone

Basaltic Igneous Rock

Siltstone or Mudstone (Argillaceous sedimentary rock) — sedimentary

Siltstone or Mudstone

Argillaceous sedimentary rock

Peridotite (Peridotite (Ultramafic Rock)) — igneous

Peridotite

Peridotite (Ultramafic Rock)

Concrete (Anthropogenic Conglomerate) — sedimentary

Concrete

Anthropogenic Conglomerate

Basalt (Vesicular/Amygdaloidal) (Basalt) — igneous

Basalt (Vesicular/Amygdaloidal)

Basalt

Slate (Foliated Metamorphic Rock) — metamorphic

Slate

Foliated Metamorphic Rock

Polygenetic Conglomerate (or Breccia) (Clastic Sedimentary Rock) — sedimentary

Polygenetic Conglomerate (or Breccia)

Clastic Sedimentary Rock

Scoria (Lava Rock) (Scoria) — igneous

Scoria (Lava Rock)

Scoria

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Granodiorite Pebble (Granodiorite) — igneous

Granodiorite Pebble

Granodiorite

Granodiorite (Cobble/Pebble) (Granodiorite) — igneous

Granodiorite (Cobble/Pebble)

Granodiorite

Unakite (or Epidote-rich Granite) (Unakite (composed of Epidote {Ca2(Al, Fe)3(SiO4)3(OH)}, Pink Orthoclase Feldspar {KAlSi3O8}, and Quartz {SiO2})) — metamorphic

Unakite (or Epidote-rich Granite)

Unakite (composed of Epidote {Ca2(Al, Fe)3(SiO4)3(OH)}, Pink Orthoclase Feldspar {KAlSi3O8}, and Quartz {SiO2})

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Granodiorite (Granodiorite (containing Quartz, Plagioclase, Orthoclase, Biotite/Hornblende)) — igneous

Granodiorite

Granodiorite (containing Quartz, Plagioclase, Orthoclase, Biotite/Hornblende)

Garnet Schist (Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)) — metamorphic

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)

Unakite (Unakite (altered granite)) — metamorphic

Unakite

Unakite (altered granite)

Unakite (Unakite (Metamorphosed granite)) — metamorphic

Unakite

Unakite (Metamorphosed granite)

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

Serpentine

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

Serpentine (Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)) — metamorphic

Serpentine

Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Painted Pet Rock (Quartzite/Sandstone base) (Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments) — sedimentary

Painted Pet Rock (Quartzite/Sandstone base)

Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments

Banded Agate (Gray/Brown) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Gray/Brown)

Silicon Dioxide (SiO2)

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

Sandstone (Pet Rock)

Clastic sedimentary rock (primarily SiO2)

Amethyst and Agate Geode Section (Silicon Dioxide (SiO2) - Crystalline Quartz and Chalcedony) — mineral

Amethyst and Agate Geode Section

Silicon Dioxide (SiO2) - Crystalline Quartz and Chalcedony

Banded Agate (Cryptocrystalline Silica (SiO2)) — mineral

Banded Agate

Cryptocrystalline Silica (SiO2)

Gastropod Fossil (Snail Steinkern) (Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)) — sedimentary

Gastropod Fossil (Snail Steinkern)

Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)

Quartz-veined Metamorphic Rock (Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)) — metamorphic

Quartz-veined Metamorphic Rock

Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)

Chert / Flint (Cryptocrystalline quartz (SiO2)) — Sedimentary

Chert / Flint

Cryptocrystalline quartz (SiO2)

Banded River Rock with Quartz Vein (Siltstone/Greywacke with Quartz (SiO2)) — sedimentary

Banded River Rock with Quartz Vein

Siltstone/Greywacke with Quartz (SiO2)

Labradorite (Labradorite (Ca, Na)(Al, Si)4O8) — mineral

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8