Rock Identifier

fossil

Fossil Shark Tooth

Chondrichthyes tooth

AI-generated identification · may be incorrect

Hardness varies by mineralization (Mohs 4-5); tan to brown color; vitreous to dull luster; composed of dentin and enameloid replaced by silica or calcium phosphate.

Identified November 14, 2026More fossil →

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Physical properties

Hardness varies by mineralization (Mohs 4-5); tan to brown color; vitreous to dull luster; composed of dentin and enameloid replaced by silica or calcium phosphate.

Formation & geological history

Formed through permineralization where buried biological teeth are slowly replaced by minerals over millions of years, often dating from the Cretaceous to Neogene periods.

Uses & applications

Valued by fossil collectors, educational displays, and occasionally used in jewelry crafting.

Geological facts

Sharks shed thousands of teeth in their lifetimes, making fossilized teeth relatively common marine fossils found in sedimentary rock layers.

Field identification & locations

Identify by the characteristic triangular crown and root structure. Commonly found in riverbeds, construction sites, and coastal bluffs.

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