Rock Identifier
Fossilized Shark Tooth (Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))) — fossil
fossil

Fossilized Shark Tooth

Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))

AI-generated identification · may be incorrect

Hardness: 3.5-5 on Mohs scale; Color: Dark grey to blackish brown; Luster: Dull to sub-vitreous; Structure: Organic osteodentine/enameloid; Specific Gravity: ~3.0

Hardness
3
Color
Dark grey to blackish brown
Luster
Dull to sub-vitreous
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Physical properties

Hardness: 3.5-5 on Mohs scale; Color: Dark grey to blackish brown; Luster: Dull to sub-vitreous; Structure: Organic osteodentine/enameloid; Specific Gravity: ~3.0

Formation & geological history

Formed through permineralization of ancient shark teeth in marine environments, where minerals like phosphate, iron, and silica replace organic material over millions of years (typically Cretaceous to Neogene periods).

Uses & applications

Popular as collector specimens, educational displays, and incorporated into casual or wire-wrapped jewelry.

Geological facts

Shark teeth are among the most abundant fossils in the world because sharks shed thousands of teeth during their lifetime, and the enamel-like outer layer is highly resistant to decay.

Field identification & locations

Identify by its characteristic blade-like shape, smooth polished outer face, dark mineralization, and porous root area. Commonly found along coastal beaches, riverbeds, and phosphate mines in regions like Florida, the Carolinas, and Morocco.

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