Fossilized Shark Tooth

Physical Properties

Hardness: 5 (Apatite); Color: Dark brown to black due to permineralization; Luster: Vitreous to dull; Structure: Elongated crown with a distinct bifurcated root; Specific gravity: approx 3.0

Formation & Geological History

Formed through permineralization where minerals like phosphate or iron replace the original organic material in a marine sedimentary environment. Typically found in Cretaceous to Paleogene deposits (approx 65-100 million years old).

Uses & Applications

Primarily used for educational purposes, scientific study, jewelry making, and private fossil collections.

Geological Facts

Sharks lose thousands of teeth throughout their lives, making teeth the most common vertebrate fossils. The dark color is caused by the specific minerals present in the sediment during the fossilization process.

Field Identification & Locations

Identify by looking for the sharp, pointed enameloid crown and the bone-like root structure. Commonly found on beaches or in creek beds in the Atlantic Coastal Plain (e.g., New Jersey, Maryland, Florida).

Identified on: 4/28/2026

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