Rock Identifier

Category

Mineral (Biogenic)

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

Learn about Mineral (Biogenic) in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Fossilized Tiger Shark Tooth (Galeocerdo cuvier (fossilized hydroxylapatite)) — sedimentary

Fossilized Tiger Shark Tooth

Galeocerdo cuvier (fossilized hydroxylapatite)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Pearl (Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone) — mineral

Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone

Pink Pearl (Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)) — mineral

Pink Pearl

Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)

Pearl (Calcium Carbonate (CaCO3) + Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) + Conchiolin

Fossiliferous Limestone (Limestone (CaCO3 - Calcium Carbonate)) — sedimentary

Fossiliferous Limestone

Limestone (CaCO3 - Calcium Carbonate)

Kidney Stone (Calcium Oxalate / Uric Acid) (Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)) — mineral

Kidney Stone (Calcium Oxalate / Uric Acid)

Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)

Pearl (Organic Mineraloid (CaCO3 + Conchiolin)) — mineral

Pearl

Organic Mineraloid (CaCO3 + Conchiolin)

Fossilized shell or bone fragment (Indeterminate biogenic calcite or apatite fossil) — fossil

Fossilized shell or bone fragment

Indeterminate biogenic calcite or apatite fossil

Fossil gastropod shell (Calcareous mollusk shell, chiefly aragonite or calcite (likely a large marine gastropod)) — fossil

Fossil gastropod shell

Calcareous mollusk shell, chiefly aragonite or calcite (likely a large marine gastropod)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Cultured freshwater pearls (Pearl; primarily aragonite (CaCO₃) in nacre with an organic conchiolin matrix) — gemstone

Cultured freshwater pearls

Pearl; primarily aragonite (CaCO₃) in nacre with an organic conchiolin matrix

Shiva Eye Shell (Operculum) (Calcium Carbonate (Aragonite), CaCO3) — mineral

Shiva Eye Shell (Operculum)

Calcium Carbonate (Aragonite), CaCO3

Baroque Pearl (Biogenic Calcium Carbonate (Aragonite/Conchiolin)) — mineral

Baroque Pearl

Biogenic Calcium Carbonate (Aragonite/Conchiolin)

Marine gastropod shell (Calcareous mollusk shell, primarily aragonite (CaCO₃), likely a whelk or conch) — fossil

Marine gastropod shell

Calcareous mollusk shell, primarily aragonite (CaCO₃), likely a whelk or conch

Hag Stone (Perforated Sedimentary Rock (typically Limestone or Sandstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Kidney Stone (Urolith / Calcium Oxalate Stone) (Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)) — mineral

Kidney Stone (Urolith / Calcium Oxalate Stone)

Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)

Pearl (Calcium Carbonate (CaCO3) with Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

Chert (with Iron Staining) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Iron Staining)

Microcrystalline Quartz (SiO2)

Pearl (Calcium Carbonate (Aragonite/Calcite mixed with Conchiolin), CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite/Calcite mixed with Conchiolin), CaCO3

Pearl (Calcium Carbonate (CaCO3)) — mineral

Pearl

Calcium Carbonate (CaCO3)

Pearl (Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)) — mineral

Pearl

Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)

Pearl (Calcium Carbonate (CaCO3) in the form of Aragonite) — mineral

Pearl

Calcium Carbonate (CaCO3) in the form of Aragonite

Red Coral (Precious Coral) (Corallium rubrum (calcium carbonate, primarily calcite with trace carotenes)) — gemstone

Red Coral (Precious Coral)

Corallium rubrum (calcium carbonate, primarily calcite with trace carotenes)

Land Snail Shell (Gastropoda (Calcium Carbonate, CaCO3)) — fossil

Land Snail Shell

Gastropoda (Calcium Carbonate, CaCO3)

Freshwater Pearl (Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite) — gemstone

Freshwater Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite

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

Chert (Pebble)

Microcrystalline Quartz (SiO2)

Pearl (Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin) — mineraloid

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin

Calcite (or Travertine / Limestone) (Calcium Carbonate (CaCO3)) — sedimentary

Calcite (or Travertine / Limestone)

Calcium Carbonate (CaCO3)

Green Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Green Chert

Microcrystalline Quartz (SiO2)

Chert (Chalcedony/Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Mother of Pearl (Nacre) (Aragonite (layered with organic polymers), CaCO3) — mineral

Mother of Pearl (Nacre)

Aragonite (layered with organic polymers), CaCO3

Polished fossil-bearing limestone pebble (Bioclastic limestone, chiefly calcite (CaCO₃), possibly containing a small shell or coral fragment) — sedimentary

Polished fossil-bearing limestone pebble

Bioclastic limestone, chiefly calcite (CaCO₃), possibly containing a small shell or coral fragment

Fossiliferous Limestone containing a Brachiopod or Mollusk Impression (Biogenic Sedimentary Rock / Fossiliferous Limestone) — sedimentary

Fossiliferous Limestone containing a Brachiopod or Mollusk Impression

Biogenic Sedimentary Rock / Fossiliferous Limestone

Pearl (Aragonite (CaCO3) with Conchiolin) — mineral

Pearl

Aragonite (CaCO3) with Conchiolin

Ammolite (Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)) — mineral

Ammolite

Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)

Fossilized tooth or jaw fragment (likely fish or reptile) (Indeterminate vertebrate bone/tooth; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)) — fossil

Fossilized tooth or jaw fragment (likely fish or reptile)

Indeterminate vertebrate bone/tooth; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

Calcite in Matrix (Calcium Carbonate (CaCO3)) — mineral

Calcite in Matrix

Calcium Carbonate (CaCO3)

Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossil oyster shell (Ostrea or Exogyra sp. (identification uncertain)) — fossil

Fossil oyster shell

Ostrea or Exogyra sp. (identification uncertain)

Pearl (Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3) — mineral

Pearl

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

Chert (Agate / Jasper pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Agate / Jasper pebble)

Microcrystalline Quartz (SiO2)