fossil
Sand Tiger Shark Tooth
Carcharias taurus (fossilized)
Hardness (Mohs 5), Color: Cream to yellowish-tan with darker root, Luster: Vitreous/shiny (enameloid), Structure: Narrow elongated crown with small lateral cusplets, Specific Gravity: 3.0
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Physical properties
Hardness (Mohs 5), Color: Cream to yellowish-tan with darker root, Luster: Vitreous/shiny (enameloid), Structure: Narrow elongated crown with small lateral cusplets, Specific Gravity: 3.0
Formation & geological history
Formed through permineralization where organic tooth material is replaced by minerals like apatite or silica. These specimens usually date from the Paleocene to Miocene epochs (approx. 5-60 million years ago).
Uses & applications
Used primarily for fossil collecting, educational purposes, and unique jewelry items.
Geological facts
Sand tiger sharks are known as 'living fossils' because their teeth have changed very little over millions of years. This specific long, thin shape is adapted for grasping slippery fish rather than cutting large prey.
Field identification & locations
Identified by the long, slender, curved crown and the presence of two small 'side teeth' or cusplets at the base. Commonly found in coastal sedimentary deposits like the Calvert Cliffs in Maryland or beaches in Florida and North Carolina.
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