fossil

Fossil Shark Tooth

Selachii (fossilized dentition)

Hardness varies from 3 to 5 on the Mohs scale depending on mineralization, color ranges from tan, brown, black, to grey, luster is vitreous to dull, crystal structure is microcrystalline apatite (calcium phosphate)

Identified August 3, 2026More fossil →

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Physical properties

Formation & geological history

Formed through the process of permineralization where organic tooth material is replaced by minerals from surrounding sediments over millions of years, commonly dating from the Cretaceous to Neogene periods

Uses & applications

Collected by fossil enthusiasts, used in educational displays, and crafted into jewelry

Geological facts

Sharks lose thousands of teeth in their lifetimes, making their teeth one of the most common types of marine fossils found globally

Field identification & locations

Found in sedimentary rock layers, riverbeds, and coastal cliffs; identified by their distinct triangular or conical shape and smooth enameloid coating