Rock Identifier
Shark Tooth Fossil (Chondrichthyes teeth (fossilized)) — fossil
fossil

Shark Tooth Fossil

Chondrichthyes teeth (fossilized)

AI-generated identification · may be incorrect

Hardness varies around 5 on the Mohs scale due to mineralization. Color ranges from black, brown, grey, to tan depending on burial sediment. Luster is dull to glassy. Crystal structure is typically microcrystalline apatite replacing original dentin and enameloid.

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Physical properties

Hardness varies around 5 on the Mohs scale due to mineralization. Color ranges from black, brown, grey, to tan depending on burial sediment. Luster is dull to glassy. Crystal structure is typically microcrystalline apatite replacing original dentin and enameloid.

Formation & geological history

Formed through the process of permineralization where minerals replace the original organic material of discarded or fallen shark teeth over millions of years, commonly dating from the Cretaceous to Neogene periods.

Uses & applications

Used primarily in fossil collecting, educational displays, lapidary art, and jewelry making.

Geological facts

Sharks shed thousands of teeth in their lifetimes, making teeth the most common shark fossil found worldwide. Megalodon teeth are among the most prized and expensive variants.

Field identification & locations

Easily identified by their distinct triangular shape, sharp serrated or smooth edges, and shiny enamel-like surface. Frequently found in riverbeds, coastal cliffs, and active quarries.

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