Rock Identifier

Category

Mineral (Biogenic)

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

Kidney Stone (Medical Specimen) (Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O) — Mineral (Biogenic)

Kidney Stone (Medical Specimen)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Mineral (Biogenic)

Fossilized Shark Tooth (Cretaceous to Neogene) (Elasmobranchii dental fossil (likely Squalicorax or similar species)) — mineral (biogenic replacement)

Fossilized Shark Tooth (Cretaceous to Neogene)

Elasmobranchii dental fossil (likely Squalicorax or similar species)

mineral (biogenic replacement)

Shell Cameo (Sardonyx Shell) (Cassis madagascariensis (Sardonyx shell)) — mineral (biogenic silica/calcium carbonate substrate)

Shell Cameo (Sardonyx Shell)

Cassis madagascariensis (Sardonyx shell)

mineral (biogenic silica/calcium carbonate substrate)

Spiny Oyster Shell (Spondylus (Calcium Carbonate, CaCO3)) — mineral

Spiny Oyster Shell

Spondylus (Calcium Carbonate, CaCO3)

Pearl (Pearl (Calcium Carbonate with organic conchiolin, CaCO3)) — mineral

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Pearl (Aragonite (CaCO3) with Conchiolin) — mineral

Pearl

Aragonite (CaCO3) with Conchiolin

Pearl (as a Biogenic Mineral) (Calcium Carbonate (mostly Aragonite) with Conchiolin; CaCO3) — mineral

Pearl (as a Biogenic Mineral)

Calcium Carbonate (mostly Aragonite) with Conchiolin; CaCO3

Brachiopod Fossil (Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)) — sedimentary

Brachiopod Fossil

Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)

Pearl (Calcium carbonate (CaCO3) as Aragonite or Calcite) — mineral

Pearl

Calcium carbonate (CaCO3) as Aragonite or Calcite

Pearl (Calcium carbonate (CaCO3) - Aragonite/Calcite variety) — mineral

Pearl

Calcium carbonate (CaCO3) - Aragonite/Calcite variety

Pearl (Biogenic CaCO3 (Aragonite)) — mineral

Pearl

Biogenic CaCO3 (Aragonite)

Human Skin (Epidermis/Dermis) (Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)) — Mineral-like biological tissue

Human Skin (Epidermis/Dermis)

Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)

Mineral-like biological tissue

Coquina (Biogenic Limestone) — sedimentary

Coquina

Biogenic Limestone

Pearl (Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite) — mineral

Pearl

Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite

Pearl (Organic gemstone (Calcium carbonate / CaCO3 + Conchiolin)) — mineral

Pearl

Organic gemstone (Calcium carbonate / CaCO3 + Conchiolin)

Pearl (as a biogenic mineral/gemstone) (Calcium Carbonate (mostly Aragonite), CaCO3) — mineral

Pearl (as a biogenic mineral/gemstone)

Calcium Carbonate (mostly Aragonite), CaCO3

Seashell Fragment (Aragonite/Calcite) (Calcium Carbonate (CaCO3) - Shell fragment) — sedimentary

Seashell Fragment (Aragonite/Calcite)

Calcium Carbonate (CaCO3) - Shell fragment

Pearl (Calcium Carbonate (Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite and Calcite), CaCO3

Precious Red Coral (Corallium rubrum (Calcium Carbonate, CaCO3)) — mineral

Precious Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Pearl (incorporated into jewelry) (Aragonite and Calcite (CaCO3)) — mineral

Pearl (incorporated into jewelry)

Aragonite and Calcite (CaCO3)

Mixed Gemstone Collection (SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)) — mineral

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Pearl (Calcium Carbonate (Aragonite) - CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite) - CaCO3

Pearl (Biogenic Mineraloid) (Calcium carbonate (Aragonite) and Conchiolin, CaCO3) — mineral

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

Pearl (Biogenic) (Nacre / Calcium Carbonate (CaCO3)) — mineral

Pearl (Biogenic)

Nacre / Calcium Carbonate (CaCO3)

Pearl (Organic Mineral (CaCO3 with conchiolin)) — mineral

Pearl

Organic Mineral (CaCO3 with conchiolin)

Pearl (Calcium carbonate (CaCO3) in the form of Aragonite or Calcite) — mineral

Pearl

Calcium carbonate (CaCO3) in the form of Aragonite or Calcite

Fighting Conch (Sea Shell) (Strombus alatus (primarily composed of Calcium Carbonate / CaCO3)) — mineral

Fighting Conch (Sea Shell)

Strombus alatus (primarily composed of Calcium Carbonate / CaCO3)

Ammolite (Biogenic gemstone (Aragonite, CaCO3)) — mineral

Ammolite

Biogenic gemstone (Aragonite, CaCO3)

Pearl (Aragonite (CaCO3 with conchiolin)) — mineral

Pearl

Aragonite (CaCO3 with conchiolin)

Black Pearl (Tahitian Style) (Calcium Carbonate (Aragonite) - CaCO3 with Conchiolin) — mineral

Black Pearl (Tahitian Style)

Calcium Carbonate (Aragonite) - CaCO3 with Conchiolin

Spiny Oyster Shell (Spondylus varians (Biogenic Calcium Carbonate)) — mineral

Spiny Oyster Shell

Spondylus varians (Biogenic Calcium Carbonate)

Chert (Jasper variation) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Red Coral (with Hematite and Black Pearl accents) (Corallium rubrum (Calcium Carbonate, CaCO3)) — mineral

Red Coral (with Hematite and Black Pearl accents)

Corallium rubrum (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

Pearl (Biogenic CaCO3 (Aragonite and Calcite)) — mineral

Pearl

Biogenic CaCO3 (Aragonite and Calcite)

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

Shiva Eye Shell (Operculum)

Calcium Carbonate (Aragonite), CaCO3

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

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

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

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin

Abalone Shell (Mother of Pearl) (Aragonite (Biogenic Calcium Carbonate, CaCO3)) — mineral

Abalone Shell (Mother of Pearl)

Aragonite (Biogenic Calcium Carbonate, CaCO3)

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

Pearl

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