fossil

Fossil shark teeth

Probably fossilized shark teeth, possibly *Otodus* or *Carcharhinus* species

AI-generated identification · may be incorrect

These are biological fossils rather than rocks, composed mainly of fossilized calcium-phosphate enamel and dentine. They show triangular/conical tooth forms, cream-white color, dull to slightly glossy luster, hardness about 5–6 Mohs, and no crystal cleavage visible.

Identified August 9, 2026More fossil →

Explore Fossil shark teeth in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Shark teeth are commonly preserved in marine sediment, where the mineralized tooth material survives after burial and partial replacement by groundwater minerals. Their ages may range from Cretaceous to Recent, but the photograph alone cannot establish a precise age.

Uses & applications

Used primarily for education, paleontology, jewelry, and fossil collecting; unusual or well-preserved teeth may be sold as display specimens.

Geological facts

Shark teeth are abundant fossils because sharks continually shed and replace teeth throughout life. The broad triangular tooth may belong to a lamnid or megatooth-type shark, while the narrower teeth could represent different species or tooth positions.

Field identification & locations

Identify them by enamel-like smooth surfaces, sharp cutting edges or pointed cusps, and a distinct root; compare with regional fossil guides. Common sources include marine deposits in Florida, the Carolinas, Morocco, Indonesia, and Australia.