Rock Identifier
Fossil shark tooth (Likely fossilized shark tooth, possibly *Carcharocles* or *Otodus* species) — fossil
fossil

Fossil shark tooth

Likely fossilized shark tooth, possibly *Carcharocles* or *Otodus* species

AI-generated identification · may be incorrect

Dark brown to black, glossy enamel crown with a smaller root; enamel hardness about 5–6 Mohs, while the mineralized root is porous and less hard. The triangular silhouette and preserved enamel are characteristic of shark teeth.

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Physical properties

Dark brown to black, glossy enamel crown with a smaller root; enamel hardness about 5–6 Mohs, while the mineralized root is porous and less hard. The triangular silhouette and preserved enamel are characteristic of shark teeth.

Formation & geological history

A biological fossil rather than an igneous, sedimentary, or metamorphic rock; formed when a shed tooth was buried in marine sediment and its tissues mineralized, commonly during the Cenozoic (about 66 million years ago to present).

Uses & applications

Primarily collected, displayed, and used in educational specimens or jewelry; value depends on species, size, completeness, color, and provenance.

Geological facts

Sharks continuously replace teeth, so isolated teeth are abundant fossils. Black coloration commonly results from mineral replacement during burial.

Field identification & locations

Identify by the enamel crown, distinct root, cutting edges, and possible serrations; common deposits occur in marine sands and coastal exposures worldwide. A scale reference and sharper image are needed for species-level identification.

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