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

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Coal

Coal

Claystone

Claystone

Shale

Shale

Marl

Black Shale

Black Shale

Leopard Skin Jasper (SiO2 (Microcrystalline Quartz with inclusions)) — mineral

Leopard Skin Jasper

SiO2 (Microcrystalline Quartz with inclusions)

mineral
Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary
Red Jasper (Opaque microcrystalline Quartz (SiO2 with Fe2O3 inclusions)) — sedimentary

Red Jasper

Opaque microcrystalline Quartz (SiO2 with Fe2O3 inclusions)

sedimentary
Fossilized cylindrical shell or bone fragment (Indeterminate biogenic carbonate or phosphatic fossil; possible fragment of a tubular shell (e.g., scaphopod) or hollow bone) — fossil

Fossilized cylindrical shell or bone fragment

Indeterminate biogenic carbonate or phosphatic fossil; possible fragment of a tubular shell (e.g., scaphopod) or hollow bone

fossil
Metal Chain (Likely Steel or a Steel Alloy) (Steel (primarily iron and carbon); specific alloy unknown) — Man-made Object (Metal/Alloy)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Man-made Object (Metal/Alloy)
Fossiliferous Limestone with Crinoid Stem fragment (Calcite (CaCO3) containing Crinoidea fossils) — sedimentary

Fossiliferous Limestone with Crinoid Stem fragment

Calcite (CaCO3) containing Crinoidea fossils

sedimentary
Sandstone Concretion (Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone Concretion

Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)

sedimentary
Weathered quartz-rich rock, likely sandstone or quartzite (Quartz (SiO₂)-rich sandstone; possibly partially metamorphosed quartzite) — sedimentary

Weathered quartz-rich rock, likely sandstone or quartzite

Quartz (SiO₂)-rich sandstone; possibly partially metamorphosed quartzite

sedimentary
Kidney Stone (Calcium Oxalate (CaC2O4), Uric Acid, or Struvite) — mineral

Kidney Stone

Calcium Oxalate (CaC2O4), Uric Acid, or Struvite

mineral
Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral
Sodium Polyacrylate (Superabsorbent Polymer) (Sodium Polyacrylate [-CH2-CH(COONa)-]n) — mineral (synthetic)

Sodium Polyacrylate (Superabsorbent Polymer)

Sodium Polyacrylate [-CH2-CH(COONa)-]n

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

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

sedimentary
Jasper with Iron Staining (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper with Iron Staining

Silicon Dioxide (SiO2) with impurities

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

Yellow Jasper

Silicon Dioxide (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary
Cobaltian Calcite (Cobaltoan Calcite) (Cobalt-bearing Calcite (Ca,Co)CO3) — mineral

Cobaltian Calcite (Cobaltoan Calcite)

Cobalt-bearing Calcite (Ca,Co)CO3

mineral
Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary
Weathered sandstone or iron-rich sedimentary fragment (Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominant)) — sedimentary

Weathered sandstone or iron-rich sedimentary fragment

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominant)

sedimentary
Chert (varietal Chalcedony or Flint) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (varietal Chalcedony or Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

sedimentary
Magnetite (Magnetite (Fe3O4)) — Mineral

Magnetite

Magnetite (Fe3O4)

Mineral
Iron-Nickel Meteorite fragment (Siderite (meteoritic iron), composed primarily of Kamacite (α-(Fe,Ni)) and Taenite (γ-(Fe,Ni))) — mineral

Iron-Nickel Meteorite fragment

Siderite (meteoritic iron), composed primarily of Kamacite (α-(Fe,Ni)) and Taenite (γ-(Fe,Ni))

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

sedimentary
Chert (with nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with nodule)

Microcrystalline Quartz (SiO2)

sedimentary
Weathered gray stone, likely granite or gneiss (Probable granitic rock; exact identification is uncertain from the image) — igneous

Weathered gray stone, likely granite or gneiss

Probable granitic rock; exact identification is uncertain from the image

igneous
Black Tourmaline (Schorl) (Schorl (Complex sodium iron aluminum borosilicate)) — mineral

Black Tourmaline (Schorl)

Schorl (Complex sodium iron aluminum borosilicate)

mineral
Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

mineral
Flint or chert (Microcrystalline quartz (SiO₂), commonly chalcedony with possible impurities) — sedimentary

Flint or chert

Microcrystalline quartz (SiO₂), commonly chalcedony with possible impurities

sedimentary
Quartz (Quartz (SiO2)) — Mineral

Quartz

Quartz (SiO2)

Mineral
Banded Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Chert (specifically Flint or Dark Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Dark Chert)

Silicon Dioxide (SiO2)

sedimentary
Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

mineral
Rhodonite (Manganese silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

mineral
Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Ferruginous Sandstone (Ironstone Conglomerate fragments) (Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)) — sedimentary

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

sedimentary
Chert (Nodule) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Nodule)

Cryptocrystalline Silica (SiO2)

sedimentary
Vesicular Basalt (Aphanitic Mafic Volcanic Rock) — igneous

Vesicular Basalt

Aphanitic Mafic Volcanic Rock

igneous
Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Fluorite

Fluorite (Calcium Fluoride - CaF2)

mineral
Green Moonstone (Garnierite) (Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)) — mineral

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

mineral
Greenstone / Greenschist (Greenschist (containing Chlorite, Epidote, Actinolite)) — metamorphic

Greenstone / Greenschist

Greenschist (containing Chlorite, Epidote, Actinolite)

metamorphic
Tiny amber-colored crystal fragment (Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral) — mineral

Tiny amber-colored crystal fragment

Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral

mineral
Hag Stone (Perforated Sandstone (composed of SiO2 and calcareous cement)) — sedimentary

Hag Stone

Perforated Sandstone (composed of SiO2 and calcareous cement)

sedimentary