Rock Identifier

Category

Sedimentary Or Metamorphic (Base Substrate)

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

Almandine Garnet in Schist (Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist) — metamorphic

Almandine Garnet in Schist

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Limestone (Ocherous) (Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)) — sedimentary

Limestone (Ocherous)

Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)

Peacock Ore (Bornite (Cu5FeS4) or Chalcopyrite treated with acid) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Blue Celestite (Celestine) (Strontium sulfate (SrSO4)) — mineral

Blue Celestite (Celestine)

Strontium sulfate (SrSO4)

Limestone (Limestone (Calcium Carbonate: CaCO3)) — sedimentary

Limestone

Limestone (Calcium Carbonate: CaCO3)

Limestone (Weathered) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Weathered)

Calcium Carbonate (CaCO3)

Chert (specifically Jasper/Carnelian Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper/Carnelian Agate)

Microcrystalline Quartz (SiO2)

Quartzite (Water-worn Cobble) (Quartzite (Composition: 90%+ SiO2)) — metamorphic

Quartzite (Water-worn Cobble)

Quartzite (Composition: 90%+ SiO2)

Sandstone (Arenite (SiO2 based with various cements)) — sedimentary

Sandstone

Arenite (SiO2 based with various cements)

Sandstone (Quartz-rich) (Arenite (SiO2 based clastic rock)) — sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Muscovite Mica (Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))) — Mineral

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Dendritic Agate (Chalcedony (SiO2) with manganese/iron oxide inclusions) — mineral

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Breccia (Breccia (Clastic Sedimentary Rock)) — sedimentary

Breccia

Breccia (Clastic Sedimentary Rock)

Chert Pebble with Quartz Veining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Chert (Iron-stained) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Iron-stained)

Chert (Cryptocrystalline Quartz, SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Galena (Lead(II) sulfide (PbS)) — mineral

Galena

Lead(II) sulfide (PbS)

Limestone (Calcareous sedimentary rock (CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (CaCO3)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Conglomerate (Conglomerative Rudite (SiO2/CaCO3 matrix)) — sedimentary

Conglomerate

Conglomerative Rudite (SiO2/CaCO3 matrix)

Chert (Gravel) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Gravel)

Silicon Dioxide (SiO2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Coquina (Biogenic Limestone (Coquina)) — sedimentary

Coquina

Biogenic Limestone (Coquina)

Coquina or Fossiliferous Limestone (Fossiliferous Calcarenite (CaCO3)) — sedimentary

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

River Cobble (Conglomerate context) (Unconsolidated Fluvial Alluvium (comprised of various lithologies like Quartzite, Granite, or Basalt)) — sedimentary

River Cobble (Conglomerate context)

Unconsolidated Fluvial Alluvium (comprised of various lithologies like Quartzite, Granite, or Basalt)

Coquina (Biogenic Limestone (mostly Calcium Carbonate, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (mostly Calcium Carbonate, CaCO3)

Coquina (Biogenic Limestone (Calcite/Aragonite base, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcite/Aragonite base, CaCO3)

Sandstone (Greywacke/Siltstone variant) (Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)) — sedimentary

Sandstone (Greywacke/Siltstone variant)

Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)

Shale (Clastic sedimentary rock (primarily clay and silt minerals)) — sedimentary

Shale

Clastic sedimentary rock (primarily clay and silt minerals)

Blue Moss Agate (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Sandstone (Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)) — sedimentary

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Fossil Crab (Decapoda (likely Avitelmessus or Raninidae family)) — sedimentary

Fossil Crab

Decapoda (likely Avitelmessus or Raninidae family)

Schist with Quartz/Mica (Mica Schist (primarily Muscovite and Quartz)) — Metamorphic

Schist with Quartz/Mica

Mica Schist (primarily Muscovite and Quartz)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Schist (Mica Schist (primarily Muscovite and Biotite)) — metamorphic

Schist

Mica Schist (primarily Muscovite and Biotite)

Slickenside (Tectonic Fault Scarp Surface) — metamorphic

Slickenside

Tectonic Fault Scarp Surface

Limestone (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Limestone

Calcite-rich Sedimentary Rock (CaCO3)