Rock Identifier

Category

Mineral (Sedimentary Context)

Browse mineral (sedimentary context) specimens identified by the Rock Identifier community.

Learn about Mineral (Sedimentary Context) in the encyclopedia

Coal

Claystone

Shale

Marl

Black Shale

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

Satin Spar (Selenite variant)

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Turquoise (Turquoise, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Sandstone (Arenite (SiO2 with various cementing minerals)) — sedimentary

Sandstone

Arenite (SiO2 with various cementing minerals)

Felsic gneiss, likely granitic gneiss (Quartz–feldspar–mica gneiss; commonly quartz + plagioclase/K-feldspar + biotite or hornblende) — metamorphic

Felsic gneiss, likely granitic gneiss

Quartz–feldspar–mica gneiss; commonly quartz + plagioclase/K-feldspar + biotite or hornblende

Brachiopod Fossil in Matrix (Phylum Brachiopoda) — fossil

Brachiopod Fossil in Matrix

Phylum Brachiopoda

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Sandstone Concretion (Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)

Sandstone with Manganese Dendrites (Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)) — sedimentary

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Limonite / Ironstone Nodule (Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O) — mineral

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Rhodochrosite (Manganese carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese carbonate (MnCO3)

Sandstone and Gravel Aggregate (Clastic Sedimentary Rock / Quartzose Sandstone) — sedimentary

Sandstone and Gravel Aggregate

Clastic Sedimentary Rock / Quartzose Sandstone

Quartz with Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz with Inclusions

Silicon Dioxide (SiO2)

Sandstone (Tumbled/River Pebble) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Tumbled/River Pebble)

Arenite (composed primarily of SiO2)

Magnetite Ore (Magnetite (Fe3O4)) — mineral

Magnetite Ore

Magnetite (Fe3O4)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Limonite (Limonite (Hydrous iron oxides, predominantly Goethite FeO(OH)·nH2O)) — mineral

Limonite

Limonite (Hydrous iron oxides, predominantly Goethite FeO(OH)·nH2O)

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Concretion (Sedimentary Concretion) — sedimentary

Concretion

Sedimentary Concretion

Banded Sandstone (Beach Pebble) (Quartz Arenite Sandstone) — sedimentary

Banded Sandstone (Beach Pebble)

Quartz Arenite Sandstone

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Magnetite (Lodestone variety) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Quartz on Sandstone (Silicon Dioxide (SiO2) in Lithic Sandstone) — sedimentary

Quartz on Sandstone

Silicon Dioxide (SiO2) in Lithic Sandstone

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Galena with Pyrite (Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)) — mineral

Galena with Pyrite

Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)

Fossilized Fish (Lepidotes) (Lepidotes sp. (Order: Lepisosteiformes)) — sedimentary

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Rainbow Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Apatite (Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Limonite (Ironstone Concretion) (Hydrous ferric oxides (FeO(OH)·nH2O)) — mineral

Limonite (Ironstone Concretion)

Hydrous ferric oxides (FeO(OH)·nH2O)

Yellow Chalcedony / Carnelian (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony / Carnelian

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (a clastic sedimentary rock)) — Sedimentary Rock

Conglomerate

Conglomerate (a clastic sedimentary rock)

Sedimentary Rock

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

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

Red Jasper (Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)) — mineral

Red Jasper

Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)

Limonite Concretion (Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O) — sedimentary

Limonite Concretion

Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Yellow Ocher (Iron-rich Silt/Clay) (Goethite-rich Limonite (FeO(OH)qnH2O)) — sedimentary

Yellow Ocher (Iron-rich Silt/Clay)

Goethite-rich Limonite (FeO(OH)qnH2O)

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

Limonite (Iron Ore)

FeO(OH)·nH2O

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)