sedimentary
Fossilized Shark Tooth
Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)
Hardness: 5 (Apatite); Color: Tan, orange-brown to grey; Luster: Vitreous to dull; Structure: Conical with a distinct root base and enameloid crown; Specific Gravity: Approx 3.0
- Hardness
- 5 (Apatite)
- Color
- Tan, orange-brown to grey
- Luster
- Vitreous to dull
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Physical properties
Hardness: 5 (Apatite); Color: Tan, orange-brown to grey; Luster: Vitreous to dull; Structure: Conical with a distinct root base and enameloid crown; Specific Gravity: Approx 3.0
Formation & geological history
Formed through permineralization where hydroxyapatite in the tooth is replaced or enriched by minerals from surrounding sediment. Most common in marine sedimentary deposits ranging from the Cretaceous to the Neogene periods (approx. 100 to 2 million years old).
Uses & applications
Primarily used for educational purposes, personal collections, and jewelry (pendants). They are also vital for paleontological research to track ancient marine ecosystems.
Geological facts
Sharks constantly shed teeth throughout their lives, potentially losing tens of thousands. Because they lack a bony skeleton, teeth are often the only part of the shark that survives as a fossil.
Field identification & locations
Identify in the field by looking for triangular or conical shapes with a glossy 'enamel' sheen against duller sediment. Commonly found in coastal areas, riverbeds flowing through fossiliferous limestone, or phosphate mines.
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