Rock Identifier

Category

Sedimentary Rock

Browse sedimentary rock specimens identified by the Rock Identifier community.

Chert (Flint variety) (Chert (SiO2)) — sedimentary

Chert (Flint variety)

Chert (SiO2)

Gneiss (Granitic Gneiss) (Gneiss (from German Gneis, related to 'spark')) — metamorphic

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

Mica Schist (Mica Schist (predominantly Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Chert (Iron-Stained) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-Stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Foliated Gneiss (River-Worn Pebble) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Foliated Gneiss (River-Worn Pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Jasper and Chert Conglomerate (Ferruginous Microcrystalline Quartz (SiO2)) — sedimentary

Jasper and Chert Conglomerate

Ferruginous Microcrystalline Quartz (SiO2)

Laterite (Laterite (Ferricrete)) — sedimentary

Laterite

Laterite (Ferricrete)

Chert Pebble (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Greywacke (River Slikenside) (Greywacke (Lithic Sandstone)) — sedimentary

Greywacke (River Slikenside)

Greywacke (Lithic Sandstone)

Granitic Gneiss (Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)) — metamorphic

Granitic Gneiss

Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)

Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Banded Iron Formation (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation

Banded Iron Formation (BIF)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone) (Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)) — Metamorphic

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Green Aventurine (Green Quartzite) (Silicon Dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Banded Agate (specifically Carnelian Agate slice) (Chalcedony (cryptocrystalline variety of Quartz), SiO2) — mineral

Banded Agate (specifically Carnelian Agate slice)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Gneiss (Schistose) (Gneiss) — metamorphic

Gneiss (Schistose)

Gneiss

Mica Schist with Iron Staining (Mica Schist) — metamorphic

Mica Schist with Iron Staining

Mica Schist

Banded Chert (or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (or Flint)

Microcrystalline Quartz (SiO2)

Chalcedony (Quartz Nodule) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz Nodule)

Silicon Dioxide (SiO2)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Green Jasper (with Quartz veining) (Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2) — sedimentary

Green Jasper (with Quartz veining)

Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2

Laterite (Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)) — sedimentary

Laterite

Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)

River Cobble (Phyllite or Quartzite) (Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)) — metamorphic

River Cobble (Phyllite or Quartzite)

Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)

Wishing Stone (Sandstone with Quartz Vein) (Arenite with Quartzite intrusion (SiO₂)) — sedimentary

Wishing Stone (Sandstone with Quartz Vein)

Arenite with Quartzite intrusion (SiO₂)

Mookaite Jasper (Silicified Radiolarite (Silicon Dioxide: SiO2)) — sedimentary

Mookaite Jasper

Silicified Radiolarite (Silicon Dioxide: SiO2)

Banded Chert (River Siltstone) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Siltstone)

Microcrystalline Quartz (SiO2)

Ocean Jasper (Orbicular Jasper) (Silicon Dioxide (SiO2) with iron and other impurities) — sedimentary

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other impurities

Chert (Quartz Variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Quartz Variety)

Silicon Dioxide (SiO2)

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Chalcedony in Host Rock (Chalcedony (SiO2)) — mineral

Chalcedony in Host Rock

Chalcedony (SiO2)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix) — Metamorphic or Igneous (context dependent)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Metamorphic or Igneous (context dependent)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Jasper (Red) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Red)

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Calcite (Yellow/Orange variety - sometimes called Honey Calcite) (Calcite) — Mineral

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Piddock bored rock (Boring Stone) (Ichnofossil-bearing Limestone or Mudstone (trace fossils by Pholadidae)) — sedimentary

Piddock bored rock (Boring Stone)

Ichnofossil-bearing Limestone or Mudstone (trace fossils by Pholadidae)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

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

Garnet-bearing Schist

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