fossil

Fossil Shark Tooth

Chondrichthyes (class)

Hardness varies by mineralization (typically Mohs 5-7 depending on the replacing minerals like silica or apatite), color ranges from grey to black, tan, or brown, luster is vitreous to dull, crystal structure is microcrystalline or amorphous replacement.

Identified July 31, 2026More fossil →

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Physical properties

Formation & geological history

Formed through the process of permineralization or fossilization over millions of years (often Cenozoic or Mesozoic eras), where organic material in the tooth is replaced by minerals from surrounding sediments.

Uses & applications

Used primarily in education, fossil collecting, paleontology, and jewelry.

Geological facts

Sharks lose thousands of teeth in their lifetimes, making their teeth some of the most common vertebrate fossils found worldwide.

Field identification & locations

Easily identified by their distinctive triangular or dagger-like shape, often with serrated edges and a visible root structure. Commonly found in riverbeds, coastal areas, and ancient marine deposits.