Rock Identifier
Shark Tooth Fossil (Selachii fossil) — fossil
fossil

Shark Tooth Fossil

Selachii fossil

AI-generated identification · may be incorrect

Mohs hardness typically 4-5 depending on mineralization; color ranges from dark brown, black, to grey; vitreous to dull luster; composed primarily of fluorapatite and calcium phosphate.

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Physical properties

Mohs hardness typically 4-5 depending on mineralization; color ranges from dark brown, black, to grey; vitreous to dull luster; composed primarily of fluorapatite and calcium phosphate.

Formation & geological history

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

Uses & applications

Valued by fossil collectors, used in jewelry making, and serves as an important index fossil for paleontology and marine ecosystem studies.

Geological facts

Shark teeth are shed continuously throughout a shark's lifetime, leading to abundant fossilization. Megalodon teeth are among the most prized and largest specimens found.

Field identification & locations

Identified by distinctive triangular or serrated shapes, often found in ancient marine deposits, riverbeds, and coastal cliffs. Look for heavy, stone-like weight and smooth enamel surfaces.

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