fossil

Fossil Shark Tooth

Chondrichthyes (Class)

Hardness varies around 5 on the Mohs scale depending on mineralization, color ranges from grey to black, brown, or tan, luster is typically dull to vitreous, crystal structure is absent as it is a biological fossil replacement.

Identified July 31, 2026More fossil →

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Physical properties

Formation & geological history

Formed through the process of permineralization where minerals replace the original organic material of the shark tooth over millions of years, commonly dating from the Cretaceous to Miocene periods.

Uses & applications

Used in fossil collecting, educational displays, jewelry, and as a decorative item.

Geological facts

Sharks lose thousands of teeth in their lifetimes, making their teeth among the most common vertebrate fossils found worldwide.

Field identification & locations

Can be identified in the field by its distinct triangular or serrated shape, enamel sheen, and often dark coloration from mineral absorption in sediments. Found globally in marine sedimentary deposits, riverbeds, and coastal exposures.