Rock Identifier

Category

Man Made Rock Like Material

Browse man made rock like material specimens identified by the Rock Identifier community.

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Yellow Chert or Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2)

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

River Stone (likely Mudstone or Siltstone) (Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)) — sedimentary

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

Granodiorite (Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)) — igneous

Granodiorite

Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)

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

Vesicular Basalt

Basalt (Extrusive Igneous Rock)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Blue Aragonite (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Blue Aragonite

Aragonite (Calcium Carbonate, CaCO3)

Basalt (Mafic volcanic rock, primarily composed of Plagioclase, Pyroxene, and Olivine) — Igneous

Basalt

Mafic volcanic rock, primarily composed of Plagioclase, Pyroxene, and Olivine

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (varietal: Flint or River Pebble) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (varietal: Flint or River Pebble)

Silicon Dioxide (SiO₂)

Hag Stone (Perforated Sedimentary Rock) — sedimentary

Hag Stone

Perforated Sedimentary Rock

Sandstone (Graywacke) (Clastic Sedimentary Rock (Lithic Sandstone)) — sedimentary

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Metagabbro / Epidote Gneiss (Epidote bearing Hornblende Gneiss) — metamorphic

Metagabbro / Epidote Gneiss

Epidote bearing Hornblende Gneiss

Basalt (Lava Rock) and Dyed Glass/Quartz (Scoria (Vesicular Basalt)) — igneous

Basalt (Lava Rock) and Dyed Glass/Quartz

Scoria (Vesicular Basalt)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Banded Calcite (Mexican Onyx) (Calcite (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcite (CaCO3)

Lapis Lazuli (Complex metamorphic rock consisting mainly of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite) — metamorphic

Lapis Lazuli

Complex metamorphic rock consisting mainly of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite

Chert (Tan/Brown) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Tan/Brown)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Sandstone with Secondary Mineral Encrustation (Arenite with Silica/Calcite deposits (SiO2 or CaCO3)) — sedimentary

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Chalcedony (specifically Agate or Common Opal variety) (Cryptocrystalline Silica (SiO2)) — mineral

Chalcedony (specifically Agate or Common Opal variety)

Cryptocrystalline Silica (SiO2)

Schist (with Iron Oxide) (Mica Schist) — metamorphic

Schist (with Iron Oxide)

Mica Schist

Sandstone (River Cobble) (Clastic Sedimentary Rock (primarily Quartz with Feldspar)) — sedimentary

Sandstone (River Cobble)

Clastic Sedimentary Rock (primarily Quartz with Feldspar)

Ferruginous Sandstone (Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)) — sedimentary

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Quartz Vein in Host Rock (Quartz (SiO2) in Mafic or Sedimentary Matrix) — igneous

Quartz Vein in Host Rock

Quartz (SiO2) in Mafic or Sedimentary Matrix

Sandstone (Arenite (primarily SiO2 with iron oxide cementation)) — sedimentary

Sandstone

Arenite (primarily SiO2 with iron oxide cementation)

Clear Quartz (or Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Chert / Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / Yellow Jasper

Silicon Dioxide (SiO2)

Chert (Cherty Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Cherty Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Halite (Halite (NaCl)) — Mineral

Halite

Halite (NaCl)

Basalt with Iron Oxidation (Vesicular Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt with Iron Oxidation

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Gossan (Iron Hat) with Quartz and Chlorite (Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite) — Mineral/Metamorphic Substrate

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Mineral/Metamorphic Substrate

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

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt Pebble with Quartz Veining (Basalt (extrusive volcanic rock)) — igneous

Basalt Pebble with Quartz Veining

Basalt (extrusive volcanic rock)

Amber (Succinite (Resinite)) — mineraloid

Amber

Succinite (Resinite)

Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Slag (Industrial Glassy Byproduct) (Ferro-silicate Slag) — Anthropogenic / Non-Natural

Slag (Industrial Glassy Byproduct)

Ferro-silicate Slag

Anthropogenic / Non-Natural

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Basalt River Pebble (Mafic Igneous Rock (Fine-grained Basalt)) — igneous

Basalt River Pebble

Mafic Igneous Rock (Fine-grained Basalt)

Chert (Jasper variety) (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2) with iron oxide impurities

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock