fossil

Fossilized shark teeth in sedimentary matrix

Elasmobranchii teeth, chiefly shark; calcium-phosphate apatite (hydroxyapatite)

AI-generated identification · may be incorrect

The specimens show triangular, serrated-toothed fossil crowns with dark brown-to-black enamel and pale, porous root material, embedded or coated in sandy limestone. Enamel is about Mohs 5–6; specific gravity is variable, and fossils commonly have dull to slightly glossy luster.

Identified September 10, 2026More fossil →

Explore Fossilized shark teeth in sedimentary matrix in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Fossilized shark teeth in sedimentary matrix
Scientific name: Elasmobranchii teeth, chiefly shark; calcium-phosphate apatite (hydroxyapatite)
Category: fossil
Identified: September 10, 2026
Method: Standard

AI Estimated Value

About $5–$30 each for common partial or small teeth; $50–$500+ for large, complete, sharply serrated specimens, depending on species and provenance.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Shark teeth were shed in marine environments, buried in sediment, and mineralized during diagenesis, commonly over millions of years from the Cretaceous through Neogene. The surrounding material appears to be weakly cemented marine sand or limestone.

Uses & applications

Primarily used for education, fossil collecting, jewelry, and display; complete, well-preserved teeth can be valuable. They are not generally used as construction stone.

Geological facts

Sharks continuously replace teeth, allowing abundant fossilization. Dark coloration usually reflects mineral replacement or staining by manganese and iron compounds.

Field identification & locations

Identify by the enamel crown, cutting edges or serrations, and distinct root; test cautiously because acid can damage fossils. Common finds include Florida, South Carolina, Morocco, Indonesia, and many ancient marine deposits.