Rock Identifier

Category

Sedimentary Or Metamorphic (Base Substrate)

Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.

Mica Schist (Mica Schist (Quartz-Biotite-Muscovite Schist)) — metamorphic

Mica Schist

Mica Schist (Quartz-Biotite-Muscovite Schist)

Mica Schist (Schist (Biotite/Muscovite rich)) — metamorphic

Mica Schist

Schist (Biotite/Muscovite rich)

Schist (Micaceous Schist) (Mica Schist) — metamorphic

Schist (Micaceous Schist)

Mica Schist

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

Serpentine

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

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Orange Quartzite (River Pebble) (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Orange Quartzite (River Pebble)

Quartzite (SiO2 with iron oxide impurities)

Native Gold (in the form of jewelry) (Gold (Au)) — mineral

Native Gold (in the form of jewelry)

Gold (Au)

Coquina (Coquina (Bioclastic Limestone)) — sedimentary

Coquina

Coquina (Bioclastic Limestone)

Coquina / Fossiliferous Limestone (Bioclastic Limestone (CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Bioclastic Limestone (CaCO3)

Ferruginous Sandstone (with Pyrite/Gold associations) (Ferruginous Arenite (SiO2 + Fe2O3)) — sedimentary

Ferruginous Sandstone (with Pyrite/Gold associations)

Ferruginous Arenite (SiO2 + Fe2O3)

Breccia (Breccia) — sedimentary

Breccia

Breccia

Chert (Field Stone/Pebble) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Field Stone/Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Shale (with Iron Oxide staining) (Fissile Mudstone (primarily Quartz and Clay minerals)) — sedimentary

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Muscovite (Mica) in Quartz Matrix (Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)) — mineral

Muscovite (Mica) in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)

Breccia (Breccia) — sedimentary

Breccia

Breccia

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Corundum (Corundum (Al2O3)) — Mineral

Corundum

Corundum (Al2O3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Coarse Sandstone Pebble (Clastic Sedimentary Rock (Sandstone)) — sedimentary

Coarse Sandstone Pebble

Clastic Sedimentary Rock (Sandstone)

Muscovite Mica (on Quartz Matrix) (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica (on Quartz Matrix)

Muscovite - KAl2(AlSi3O10)(OH)2

Muscovite Mica (Granitic Pegmatite) (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Asphalt / Road Aggregate (Bituminous Conglomerate (synthetic)) — sedimentary

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Leopard Skin Jasper (Rhyolite (Silicon Dioxide with impurities), SiO2) — igneous

Leopard Skin Jasper

Rhyolite (Silicon Dioxide with impurities), SiO2

Limestone (Sedimentary rock composed of Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed of Calcium Carbonate (CaCO3)

Silty Sand / Loam (Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)) — sedimentary

Silty Sand / Loam

Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Mica Schist (Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

Kyanite (Kyanite (Al2SiO5)) — Mineral

Kyanite

Kyanite (Al2SiO5)

Limestone (specifically a Crushed Aggregate fragment) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

Quartz Vein in Host Rock (Gabbro or Basalt) (Silicon Dioxide (SiO2) with Mafic Silicates) — metamorphic/igneous

Quartz Vein in Host Rock (Gabbro or Basalt)

Silicon Dioxide (SiO2) with Mafic Silicates

metamorphic/igneous

Hag Stone (Perforated Sedimentary Rock (typically Limestone or Sandstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate (Conglomerate (Clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Clastic sedimentary rock)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (specifically Iron-stained or Argillaceous Limestone) (Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities) — sedimentary

Limestone (specifically Iron-stained or Argillaceous Limestone)

Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Ferruginous Sandstone (with possible Epidote/Chlorite coloring) (Sandstone (SiO2 dominated with Fe2O3 staining)) — sedimentary

Ferruginous Sandstone (with possible Epidote/Chlorite coloring)

Sandstone (SiO2 dominated with Fe2O3 staining)

Sandstone (likely Greywacke or Siltstone variety) (Arenite / Siltstone (primarily SiO2)) — sedimentary

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)