fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Hardness varies based on mineralization (typically Mohs 5-7), color ranges from tan, gray, brown to black depending on the minerals in the sediment where it fossilized, luster is generally dull to vitreous on polished surfaces.

Identified July 28, 2026More fossil →

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Physical properties

Formation & geological history

Formed through the process of permineralization, where original biological material is replaced by minerals like silica, calcite, or phosphate over millions of years, typically dating from the Cretaceous to Cenozoic periods.

Uses & applications

Prized by fossil collectors, used in educational displays, and sometimes set into jewelry.

Geological facts

Sharks lose thousands of teeth in their lifetimes, making fossilized shark teeth relatively common compared to other skeletal fossils. The roots are often the first part to disintegrate, leaving the distinctive triangular crown.

Field identification & locations

Found worldwide in sedimentary deposits, riverbeds, and coastal cliffs, especially where ancient oceans once covered land. Identified by its distinct triangular or blade-like shape, sometimes with serrated edges.