sedimentary
Fossilized Shark Tooth
Fossilized elasmobranch tooth (Apatite/Calcium Phosphate)
Hardness: 5 (Mohs scale), Color: Jet black to dark grey, Luster: Vitreous to dull, Crystal structure: Hexagonal (original mineral), Shape: Triangular with a root and crown
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Physical properties
Hardness: 5 (Mohs scale), Color: Jet black to dark grey, Luster: Vitreous to dull, Crystal structure: Hexagonal (original mineral), Shape: Triangular with a root and crown
Formation & geological history
Formed through permineralization where minerals like silica or phosphate replace the organic matter over millions of years. Most common specimens range from 5 to 65 million years old (Miocene to Paleocene epochs).
Uses & applications
Predominantly used for collector items, educational specimens, and jewelry (pendants). Used in paleontological research to track ancient marine ecosystems.
Geological facts
Shark teeth are the most common shark fossils because sharks lose thousands of teeth throughout their lives. The dark color often comes from absorbing minerals like phosphorus or manganese from the surrounding sediment.
Field identification & locations
Identify by its distinct triangular blade and darker-colored root area. Often found on beaches after storms or in riverbeds in coastal regions like Florida, the Carolinas, and Morocco.
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