fossil

Fossil shark teeth

Likely fossilized shark teeth; exact species indeterminate from the image, possibly Carcharhiniformes or related taxa

AI-generated identification · may be incorrect

Small triangular teeth with serrated edges and preserved enamel-like surfaces; fossils commonly consist of calcium-phosphate apatite. Mohs hardness is roughly 5, with a glossy enamel luster and dense, fine-grained structure.

Identified August 9, 2026More fossil →

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Physical properties

Formation & geological history

Shark teeth were shed during life, buried in marine sediment, and mineralized through diagenesis, often during the Cenozoic (about 66 million years ago to present). The surrounding sediment may later erode away, exposing the teeth.

Uses & applications

Primarily used for fossil collecting, education, and jewelry; they have little industrial value. Larger, complete, species-identifiable teeth are most desirable to collectors.

Geological facts

Sharks continuously replace teeth, so isolated teeth are common fossils. Serrations, crown shape, root form, and tooth size help identify species and jaw position.

Field identification & locations

Common in marine sedimentary deposits, especially coastal fossil beds, river exposures, and phosphate deposits in Florida, South Carolina, Morocco, and Australia. Avoid harsh cleaning or acids, which can damage enamel and roots.