Rock Identifier

Category

Not A Rock (Synthetic Material)

Browse not a rock (synthetic material) specimens identified by the Rock Identifier community.

Learn about Not A Rock (Synthetic Material) in the encyclopedia

Dunite

Metarhyolite

Limonite

Rock Salt

Coral Rock

Rock Gypsum

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Opalite

Serpentine (Serpentinite) (Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine (Serpentinite)

Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4

Peridotite (with Olivine) (Peridotite (dominantly (Mg, Fe)2SiO4)) — igneous

Peridotite (with Olivine)

Peridotite (dominantly (Mg, Fe)2SiO4)

Basalt (Africite (Mafic Igneous Rock)) — igneous

Basalt

Africite (Mafic Igneous Rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Serpentinite (Serpentinite (composed primarily of minerals in the Serpentine group)) — metamorphic

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group)

Chert (Common Opal/Agate mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Agate mixture)

Microcrystalline Quartz (SiO2)

Conglomerate (Clastic Sedimentary Rock (Conglomerate)) — sedimentary

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Fossiliferous Calclutite / Bio-calcarenite (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Dark mafic rock, likely basalt (Basalt; primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides) — igneous

Dark mafic rock, likely basalt

Basalt; primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Epidote (Unakite component) / Green Quartzite (Ca2(Al,Fe)3(SiO4)3(OH)) — metamorphic

Epidote (Unakite component) / Green Quartzite

Ca2(Al,Fe)3(SiO4)3(OH)

Gneissic Granite (Granite Gneiss) — metamorphic

Gneissic Granite

Granite Gneiss

Granite (Granite) — Igneous

Granite

Granite

Vesicular basalt (weathered scoriaceous basalt) (Basalt; chiefly plagioclase, pyroxene, and commonly olivine (approximately 45–52% SiO₂)) — igneous

Vesicular basalt (weathered scoriaceous basalt)

Basalt; chiefly plagioclase, pyroxene, and commonly olivine (approximately 45–52% SiO₂)

Weathered river stones, likely basaltic andesite and related volcanic rocks (Fine-grained mafic/intermediate volcanic rocks; commonly basalt (plagioclase + pyroxene ± olivine) or andesite (plagioclase + pyroxene ± amphibole)) — igneous

Weathered river stones, likely basaltic andesite and related volcanic rocks

Fine-grained mafic/intermediate volcanic rocks; commonly basalt (plagioclase + pyroxene ± olivine) or andesite (plagioclase + pyroxene ± amphibole)

Jasper Pebble (Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide Impurities) — sedimentary

Jasper Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide Impurities

Sandstone with Quartz Vein (Arenite with Quartz (SiO2) protrusion) — sedimentary

Sandstone with Quartz Vein

Arenite with Quartz (SiO2) protrusion

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Tufa (Calcareous Tufa (Calcium carbonate, CaCO3)) — sedimentary

Tufa

Calcareous Tufa (Calcium carbonate, CaCO3)

Hardened Gray Mudstone (Argillite / Silicified Mudstone (principally SiO2 and Al2Si2O5(OH)4)) — sedimentary

Hardened Gray Mudstone

Argillite / Silicified Mudstone (principally SiO2 and Al2Si2O5(OH)4)

Quartzite (River Pebble) (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphic Quartz (SiO2)

Sandstone (specifically Cross-bedded Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (specifically Cross-bedded Sandstone)

Arenite (composed primarily of SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Yellow Quartzite (River Pebble) (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Metamorphic Quartzite (primarily SiO2)

Limestone (Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)

Limestone (specifically Grainstone or Micrite) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Grainstone or Micrite)

Calcium Carbonate (CaCO3)

Iron-rich chert or jasper (Microcrystalline quartz (SiO₂), colored by hematite/goethite inclusions) — sedimentary

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), colored by hematite/goethite inclusions

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

Serpentinite

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

Green Jasper Pebble (Microcrystalline Quartz (SiO2) with impurities) — sedimentary

Green Jasper Pebble

Microcrystalline Quartz (SiO2) with impurities

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Greywacke (Sandstone) (Lithic wacke) — sedimentary

Greywacke (Sandstone)

Lithic wacke

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Red Sandstone) (Arenite) — sedimentary

Sandstone (Red Sandstone)

Arenite

Jasper River Stone (Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)) — sedimentary

Jasper River Stone

Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)

Basalt (Basalt) — igneous

Basalt

Basalt

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Weathered quartz-rich rock, possibly sandstone or quartzite (Likely quartzite (mostly SiO₂), though a granular sandstone is also possible) — metamorphic

Weathered quartz-rich rock, possibly sandstone or quartzite

Likely quartzite (mostly SiO₂), though a granular sandstone is also possible

Blue Quartzite (Dyed) (Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)) — metamorphic

Blue Quartzite (Dyed)

Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)

Grey Chert River Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Grey Chert River Pebble

Microcrystalline Quartz (SiO2)