Rock Identifier
Cowrie Shell Fossil (Cypraea (Family Cypraeidae)) — fossil
fossil

Cowrie Shell Fossil

Cypraea (Family Cypraeidae)

AI-generated identification · may be incorrect

Hardness of 3.5 on the Mohs scale, typically white to glossy tan, porcelain-like luster, with a long narrow aperture lined with teeth.

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Physical properties

Hardness of 3.5 on the Mohs scale, typically white to glossy tan, porcelain-like luster, with a long narrow aperture lined with teeth.

Formation & geological history

Formed through the biomineralization of calcium carbonate by marine gastropod mollusks, often preserved in sedimentary limestone and marl deposits from the Cenozoic era.

Uses & applications

Used in jewelry, crafting, historical currency, and as prized specimens for fossil and shell collectors.

Geological facts

Cowrie shells have been used as a form of currency across Africa, Asia, and Oceania for centuries due to their durability and uniform size.

Field identification & locations

Found worldwide in shallow tropical marine sediments and ancient limestone strata; identify by their smooth, rounded dome shape and serrated slit opening.

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Phylum Echinodermata, Class Crinoidea

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Fossiliferous limestone (likely a crinoidal or shell-fragment limestone) (Bioclastic limestone, composed chiefly of calcite (CaCO₃)) — sedimentary

Fossiliferous limestone (likely a crinoidal or shell-fragment limestone)

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

sedimentary
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Porous limestone pebble

Calcite-rich limestone (primarily CaCO₃); exact identification is uncertain from the image

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Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image

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