sedimentary

Fossilized Shark Tooth (Fragment)

Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)

AI-generated identification · may be incorrect

Hardness: 5 (enamel) on Mohs scale; Color: Tan to dark grey; Luster: Dull to semi-glossy; Structure: Dense calcium phosphate (apatite); Cleavage: None/conchoidal fracture

Hardness: 5 (enamel) on Mohs scale
Color: Tan to dark grey
Luster: Dull to semi-glossy

Identified May 10, 2026More sedimentary →

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Physical properties

Hardness: 5 (enamel) on Mohs scale; Color: Tan to dark grey; Luster: Dull to semi-glossy; Structure: Dense calcium phosphate (apatite); Cleavage: None/conchoidal fracture

Formation & geological history

Formed through permineralization of shark teeth where organic components are replaced by minerals in marine sediments. Generally dates from the Cretaceous to Neogene periods (approx. 100 to 2 million years ago).

Uses & applications

Primarily for personal collections, educational tools, and occasionally used in craft jewelry.

Geological facts

Sharks shed thousands of teeth throughout their lives, which is why they are one of the most common vertebrate fossils found worldwide.

Field identification & locations

Identify by the distinct division between the 'crown' (top darker smooth part) and the 'root' (lower porous tan part). Commonly found in riverbeds, coastal beaches, and phosphate mines.