sedimentary
Fossilized Shark Tooth (Sand Tiger)
Carcharias taurus (fossil specimen)
Hardness: 5 (Apatite); Color: Gray, tan, or black depending on mineral replacement; Luster: Vitreous to sub-metallic; Structure: Enameloid crown with a bifurcated root. Specific gravity: approx 2.9-3.1.
- Hardness
- 5 (Apatite)
- Color
- Gray, tan, or black depending on mineral replacement
- Luster
- Vitreous to sub-metallic
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Physical properties
Hardness: 5 (Apatite); Color: Gray, tan, or black depending on mineral replacement; Luster: Vitreous to sub-metallic; Structure: Enameloid crown with a bifurcated root. Specific gravity: approx 2.9-3.1.
Formation & geological history
Formed through permineralization where hydroxyapatite in the tooth is replaced by minerals from the surrounding sediment. This specimen is likely from the Neogene period (approx. 5-23 million years ago), found in marine sedimentary layers.
Uses & applications
Collectibles, jewelry (pendants), and educational geological/paleontological displays.
Geological facts
Shark teeth are the most common shark fossils because sharks lose thousands of teeth in their lifetime. Unlike the cartilage of their skeletons, the teeth are dense and fossilize easily.
Field identification & locations
Identified by the long, slender crown and distinct T-shaped bifurcated root. Commonly found in coastal areas like Venice Beach, Florida, or the cliffs of Maryland. Best found by sifting through beach sand or gravel at low tide.
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