Rock Identifier
Shark Tooth Fossil (Chondrichthyes tooth) — fossil
fossil

Shark Tooth Fossil

Chondrichthyes tooth

AI-generated identification · may be incorrect

Hardness varies around 5 on the Mohs scale depending on mineralization; color ranges from black, gray, brown, to blue; luster is dull to vitreous; structure retains original biological tooth morphology with dense dentin and enameloid.

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Physical properties

Hardness varies around 5 on the Mohs scale depending on mineralization; color ranges from black, gray, brown, to blue; luster is dull to vitreous; structure retains original biological tooth morphology with dense dentin and enameloid.

Formation & geological history

Formed through the process of permineralization where buried biological teeth are slowly replaced by minerals like silica, apatite, or calcite over millions of years, often dating from the Cretaceous to Miocene epochs.

Uses & applications

Valuable for paleontological study, educational displays, jewelry, and amateur fossil collecting.

Geological facts

Shark teeth are shed continuously throughout a shark's lifetime, with an individual shedding thousands of teeth, making them one of the most common vertebrate fossils found.

Field identification & locations

Identify by characteristic triangular, blade-like, or peg shapes with serrated or smooth cutting edges; commonly found in riverbeds, eroding coastal cliffs, and marine sedimentary deposits.

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