Rock Identifier

Category

Mineral And Sedimentary

Browse mineral and sedimentary specimens identified by the Rock Identifier community.

Learn about Mineral And Sedimentary in the encyclopedia

Coal

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Glauconite

Breccia

Hutcheonite

Halite

Ironstone

Sperrylite

Baddeleyite

Anatase

Brookite

Blue Howlite (Dyed) (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Likely banded gneiss (Gneiss, a foliated metamorphic rock composed chiefly of quartz, feldspar, and mica) — metamorphic

Likely banded gneiss

Gneiss, a foliated metamorphic rock composed chiefly of quartz, feldspar, and mica

Limonite (Ironstone) (FeO(OH)·nH2O) — sedimentary

Limonite (Ironstone)

FeO(OH)·nH2O

Limonite / Ironstone (Hydrated Iron Oxide (FeO(OH)·nH2O)) — sedimentary

Limonite / Ironstone

Hydrated Iron Oxide (FeO(OH)·nH2O)

Shale (Argillite / Shale) — sedimentary

Shale

Argillite / Shale

Sedimentary Outcrop (Sandstone/Shale) (Sedimentary bedrock formation (variable composition)) — sedimentary

Sedimentary Outcrop (Sandstone/Shale)

Sedimentary bedrock formation (variable composition)

Sandstone (Iron-stained) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Arenite (primarily SiO2 with Fe2O3 staining)

Light-colored limestone (Calcitic limestone; primarily calcium carbonate (CaCO₃), mineral calcite) — sedimentary

Light-colored limestone

Calcitic limestone; primarily calcium carbonate (CaCO₃), mineral calcite

Aragonite Star Cluster (Cross-section) (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Aragonite Star Cluster (Cross-section)

Aragonite (Calcium Carbonate, CaCO3)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Halite (Rock Salt) (Halite (Sodium Chloride, NaCl)) — mineral

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Orange Calcite (Cleavage Rhomb) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Orange Calcite (Cleavage Rhomb)

Calcite (Calcium Carbonate, CaCO3)

Limonite/Ironstone (Limonite (FeO(OH)·nH2O)) — mineral

Limonite/Ironstone

Limonite (FeO(OH)·nH2O)

River Stone (Sandstone or Siltstone) (Sedimentary Rock (Clastic)) — sedimentary

River Stone (Sandstone or Siltstone)

Sedimentary Rock (Clastic)

Banded Sandstone (Clastic Sedimentary Sandstone) — sedimentary

Banded Sandstone

Clastic Sedimentary Sandstone

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Pyrite with Quartz (Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)) — mineral

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Sandstone (with minor weathering/pitting) (Clastic Sedimentary Rock (composed mostly of SiO2)) — sedimentary

Sandstone (with minor weathering/pitting)

Clastic Sedimentary Rock (composed mostly of SiO2)

Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Satin Spar Selenite (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Sandstone (likely Arkose or Lithic) (Clastic sedimentary rock (SiO2 + impurities)) — sedimentary

Sandstone (likely Arkose or Lithic)

Clastic sedimentary rock (SiO2 + impurities)

Banded Gneiss (Gneiss (Felsic to Mafic Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Felsic to Mafic Metamorphic Rock)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic sedimentary rock) — sedimentary

Sandstone

Clastic sedimentary rock

River Cobble (likely Siltstone or Sandstone) (Clastic Sedimentary Rock) — sedimentary

River Cobble (likely Siltstone or Sandstone)

Clastic Sedimentary Rock

Limonite (Iron Ore) (FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Quartz Geode (Silicon Dioxide (SiO2) in Calcareous or Siliceous Matrix) — mineral

Quartz Geode

Silicon Dioxide (SiO2) in Calcareous or Siliceous Matrix

Ironstone (Limonite/Hematite concretion) (Ferruginous Siltstone / Goethite (FeO(OH))) — sedimentary

Ironstone (Limonite/Hematite concretion)

Ferruginous Siltstone / Goethite (FeO(OH))

Limonite (Iron Ore) (Hydrated ferric oxide mixture (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron Ore)

Hydrated ferric oxide mixture (FeO(OH)·nH2O)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone and River Pebbles (Sedimentary Rock (Sandstone / Quartzite / Chert)) — sedimentary

Sandstone and River Pebbles

Sedimentary Rock (Sandstone / Quartzite / Chert)

Biotite-rich gneiss (Gneiss, likely quartz–feldspar–biotite gneiss) — metamorphic

Biotite-rich gneiss

Gneiss, likely quartz–feldspar–biotite gneiss