Rock Identifier

Category

Rock (Likely Sedimentary)

Browse rock (likely sedimentary) specimens identified by the Rock Identifier community.

Learn about Rock (Likely Sedimentary) in the encyclopedia

Asphalt Rock

Rock Gypsum

Conglomerate

Breccia

Ironstone

Limestone

Claystone

Phosphorite

Chert

Coal

Pisolite

Mudstone

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Muscovite Mica Schist (Metamorphic Rock (Muscovite-Biotite Schist)) — metamorphic

Muscovite Mica Schist

Metamorphic Rock (Muscovite-Biotite Schist)

Chert Geode or Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Geode or Nodule

Microcrystalline Quartz (SiO2)

Sandstone Pebble (Arenite (primarily SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

Red Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

River Cobble (likely Basalt or Chert) (Basalt (Mafic volcanic rock)) — igneous

River Cobble (likely Basalt or Chert)

Basalt (Mafic volcanic rock)

Sandstone (Quartzose) (Arenite (Siliciclastic sedimentary rock)) — sedimentary

Sandstone (Quartzose)

Arenite (Siliciclastic sedimentary rock)

Gneiss (likely Granitic Gneiss) (Gneiss) — metamorphic

Gneiss (likely Granitic Gneiss)

Gneiss

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Moqui Marble (Shaman Stone) (Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)) — sedimentary

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)

Red Jasper (or Agate/Jasper mixture) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper (or Agate/Jasper mixture)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (Ferruginous) (Sandstone (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with Fe2O3 cement)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Gneiss

High-grade regional metamorphic rock (Foliated)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Chert (Commonly called Jasper or Flint) (Chert (SiO2)) — sedimentary

Chert (Commonly called Jasper or Flint)

Chert (SiO2)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartzite Pebble) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Honey calcite (likely) (Calcite — calcium carbonate, CaCO₃) — mineral

Honey calcite (likely)

Calcite — calcium carbonate, CaCO₃

Banded gneiss (Gneiss, commonly quartz–feldspar–mica gneiss) — metamorphic

Banded gneiss

Gneiss, commonly quartz–feldspar–mica gneiss

Quartz (Milky/Gravel variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Gravel variety)

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Calcareous or Quartz-rich) (Arenite) — sedimentary

Sandstone (Calcareous or Quartz-rich)

Arenite

Ironstone pebble (Ironstone (Ferruginous Sedimentary Rock)) — sedimentary

Ironstone pebble

Ironstone (Ferruginous Sedimentary Rock)

Goldstone (Red) (Aventurine Glass) — Man-made material (Simulated Mineral)

Goldstone (Red)

Aventurine Glass

Man-made material (Simulated Mineral)

Bivalve Fossil (Clam) (Class Bivalvia (e.g., Exogyra or Gryphaea species)) — fossil

Bivalve Fossil (Clam)

Class Bivalvia (e.g., Exogyra or Gryphaea species)

Feldspar-rich Granite (or Gneiss) Pebble (Granite (primarily Orthoclase Feldspar and Quartz)) — igneous

Feldspar-rich Granite (or Gneiss) Pebble

Granite (primarily Orthoclase Feldspar and Quartz)

Sandstone (Sedimentary Rock (Quartz arenite or arkose)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite or arkose)

Educational Geologic Collection (Mixed Mineral and Rock Collection (Various compositions)) — mineral

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Sandstone/Quartzite (Sedimentary Rock (composed mainly of SiO2)) — sedimentary

Sandstone/Quartzite

Sedimentary Rock (composed mainly of SiO2)

Tektite (likely Australite) (Tektite (no specific chemical formula as it's a natural glass of variable composition, mostly SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O, TiO2)) — Mineral (specifically a mineraloid)

Tektite (likely Australite)

Tektite (no specific chemical formula as it's a natural glass of variable composition, mostly SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O, TiO2)

Mineral (specifically a mineraloid)

Sandstone (Arenite (SiO2 composition dominant)) — sedimentary

Sandstone

Arenite (SiO2 composition dominant)

Sandstone with Concretions / Liesegang Rings (Arenite with iron oxide banding) — sedimentary

Sandstone with Concretions / Liesegang Rings

Arenite with iron oxide banding

Tumbled orange chalcedony (likely carnelian) (Cryptocrystalline quartz, SiO₂; carnelian is orange-red chalcedony colored mainly by iron oxides) — gemstone

Tumbled orange chalcedony (likely carnelian)

Cryptocrystalline quartz, SiO₂; carnelian is orange-red chalcedony colored mainly by iron oxides

Chert / Flint (Microcrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline quartz (SiO2)