Fossil Shark Tooth

Physical Properties

Hardness: Approx 5 (apatite); Color: Tan to dark brown; Luster: Dull to vitreous; Structure: Organic hydroxyapatite mineralization; Cleavage: None

Formation & Geological History

Formed through permineralization where organic tooth material is replaced by minerals in marine sediments. Likely Neogene to Paleogene periods (2-60 million years ago).

Uses & Applications

Used primarily for fossil collecting, educational purposes, and small-scale jewelry such as pendants.

Geological Facts

Sharks can lose tens of thousands of teeth in a lifetime. Because their skeletons are cartilage, teeth are often the only parts that fossilize.

Field Identification & Locations

Identify by a triangular crown and a distinct root base. Often found on beaches, in creek beds with exposed limestone or phosphate deposits, or in coastal quarries.

Identified on: 4/28/2026

Mode: Standard