sedimentary (fossil)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)

AI-generated identification · may be incorrect

Hardness: 5; Color: Tan, beige, brown or grayish due to mineral permineralization; Luster: Vitreous to dull; Structure: Triangular, smooth blade with a robust root; Specific Gravity: ~2.8-3.1

Hardness: 5
Luster: Vitreous to dull

Identified March 20, 2026More sedimentary (fossil) →

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Physical properties

Hardness: 5; Color: Tan, beige, brown or grayish due to mineral permineralization; Luster: Vitreous to dull; Structure: Triangular, smooth blade with a robust root; Specific Gravity: ~2.8-3.1

Formation & geological history

Formed through permineralization within sedimentary marine matrix. These specimens typically date back to the Early Eocene to Paleocene epochs (approximately 40 to 60 million years ago).

Uses & applications

Used primarily for fossil collecting, educational museum displays, and occasionally in jewelry (pendants). Smaller common specimens are significant in the trade of curiosities.

Geological facts

The Otodus obliquus was a massive prehistoric mackerel shark and is considered an ancestor to the Megalodon. Some specimens suggest the shark could reach lengths of up to 30 feet.

Field identification & locations

Identify by its triangular shape, smooth edges (unlike serrated Megalodon teeth), and often a distinct 'v' shaped root. Commonly found in phosphate mines in Morocco and along North American Atlantic coastal sites. For collectors, check the integrity of the root as it is often broken.