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

Coral Rock

Asphalt Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Anorthosite

Cataclasite

Peridotite

Phosphorite

Gondite

Dunite

Sandstone (likely Greywacke or Lithic Sandstone) (Arenite / Wacke) — sedimentary

Sandstone (likely Greywacke or Lithic Sandstone)

Arenite / Wacke

Quartz Veined Basalt (Mafic Volcanic Rock with Microcrystalline Quartz (SiO2)) — igneous

Quartz Veined Basalt

Mafic Volcanic Rock with Microcrystalline Quartz (SiO2)

Granite with Cupules / Bedrock Mortars (Granite (felsic intrusive plutonic rock)) — igneous

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Generic Rock Fragment (Rock Fragment) — sedimentary

Generic Rock Fragment

Rock Fragment

Quartz vein in dark host rock (Quartz (SiO₂), likely in basalt, gabbro, or altered mafic rock) — mineral

Quartz vein in dark host rock

Quartz (SiO₂), likely in basalt, gabbro, or altered mafic rock

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Fish Fossil in Limestone (Lycoptera (likely) in Micritic Limestone) — sedimentary

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

Sandstone (Sandstone (clastic sedimentary rock)) — Rock

Sandstone

Sandstone (clastic sedimentary rock)

Bivalve Seashell Fossil (Class Bivalvia) — fossil

Bivalve Seashell Fossil

Class Bivalvia

Geode (Quartz / Chalcedony nodule) — sedimentary

Geode

Quartz / Chalcedony nodule

Quartzite River Stone (Quartzite (SiO2)) — metamorphic

Quartzite River Stone

Quartzite (SiO2)

Mudstone (Argillite) — sedimentary

Mudstone

Argillite

Ferrous Slag (Iron Smelting By-product) (Fused Siliceous Slag) — Anthropogenic Material (Man-made Rock)

Ferrous Slag (Iron Smelting By-product)

Fused Siliceous Slag

Anthropogenic Material (Man-made Rock)

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

Sandstone (Painted)

Arenite (primarily SiO2)

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Gneiss (Pebble) (Gneiss) — metamorphic

Gneiss (Pebble)

Gneiss

Brecciated Jasper (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Chert (Yellow/Tan Variety) (Chert (SiO2)) — sedimentary

Chert (Yellow/Tan Variety)

Chert (SiO2)

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

Serpentine (Serpentinite)

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

Vesicular Basalt (Extrusive mafic igneous rock) — igneous

Vesicular Basalt

Extrusive mafic igneous rock

Grey Limestone Pebble (Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Grey Limestone Pebble

Limestone (Calcium Carbonate - CaCO3)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Slate with Quartz Vein (Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)) — metamorphic

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Quartz Geode (Silicon dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon dioxide (SiO2)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Ulexite (NaCaB5O6(OH)6·5H2O) — mineral

Ulexite

NaCaB5O6(OH)6·5H2O

Pink Granite (Phaneritic Quartz-Feldspar Plutonic Rock) — igneous

Pink Granite

Phaneritic Quartz-Feldspar Plutonic Rock

Shale (Shale (clastic sedimentary rock composed of silt and clay-sized particles)) — sedimentary

Shale

Shale (clastic sedimentary rock composed of silt and clay-sized particles)

Dalmatian Jasper / Dalmatian Stone (Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)) — igneous

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Shale (Fissile mudstone (Shale)) — sedimentary

Shale

Fissile mudstone (Shale)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

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

Serpentine

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

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide (Limonite/Hematite) coating) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide (Limonite/Hematite) coating

Vesicular Basalt with Epidote (Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))) — igneous

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

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

Vesicular Basalt (Scoria)

Aphanitic Mafic Igneous Rock (Vesicular Basalt)

Quartz-rich gravel fragment (Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions) — mineral

Quartz-rich gravel fragment

Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions

Halite (Sodium Chloride (NaCl)) — mineral

Halite

Sodium Chloride (NaCl)

Schist (Metamorphic Schist) — metamorphic

Schist

Metamorphic Schist

Coal (Carbonaceous sedimentary rock / Lignite to Bituminous coal) — sedimentary

Coal

Carbonaceous sedimentary rock / Lignite to Bituminous coal

Pyrite-bearing Rock / Pyrite Ore (Iron Sulfide (FeS2) in host rock matrix) — mineral

Pyrite-bearing Rock / Pyrite Ore

Iron Sulfide (FeS2) in host rock matrix

Quartzite with Hematite staining (Quartzite (SiO2) with iron oxide inclusions) — metamorphic

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions