Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
Category
Mineral (Biogenic)
Browse mineral (biogenic) specimens identified by the Rock Identifier community.
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Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
mineral
Ammolite
Biogenic gemstone (Aragonite, CaCO3)
mineral
Shiva Eye Shell (Operculum)
Calcium Carbonate (Aragonite), CaCO3
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Land Snail Shell
Gastropoda (Calcium Carbonate, CaCO3)
fossil
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin
mineraloid
Fossilized Tiger Shark Tooth
Galeocerdo cuvier (fossilized hydroxylapatite)
sedimentary
Hag Stone
Perforated Sedimentary Rock (typically Limestone or Sandstone)
sedimentary
Oyster Shell Fragment
Crassostrea virginica (or related Bivalvia)
fossil
Pearl
Calcium Carbonate (CaCO3) in the form of Aragonite
mineral
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Goethite
Goethite (FeO(OH))
mineral
Mother of Pearl (Nacre)
Aragonite (layered with organic polymers), CaCO3
mineral
Red Coral (with Hematite and Black Pearl accents)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Spiny Oyster Shell
Spondylus varians (Biogenic Calcium Carbonate)
mineral
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineral
Pearl
Aragonite and Calcite (CaCO3) with Conchiolin
mineral
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Calcitic)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Limestone (CaCO3 - Calcium Carbonate)
sedimentary
Pearl
Calcium Carbonate (CaCO3)
mineral
Abalone Shell (Mother of Pearl)
Aragonite (Biogenic Calcium Carbonate, CaCO3)
mineral
Pearl
Calcium Carbonate (Aragonite/Calcite mixed with Conchiolin), CaCO3
mineral
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
mineral
Coquina (Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary