Fossilized Shark Tooth (Basal Bone)

Physical Properties

Hardness: 5; Color: Cream, tan, or yellow; Luster: Vitreous to waxy; Crystal structure: Hexagonal (as apatite); Cleavage: None; Specific Gravity: Approx 3.0

Formation & Geological History

Formed through permineralization where organic tooth material is replaced by minerals like silica or apatite in marine sedimentary layers, typically from the Paleocene or Eocene epochs (approx. 50-60 million years ago).

Uses & Applications

Primarily for paleontological study, educational displays, and personal fossil collections. Often used in wire-wrapped jewelry or as curiosities.

Geological Facts

Shark skeletons are cartilaginous and rarely fossilize, but their enamel-hard teeth are abundant in the fossil record. A single shark can lose thousands of teeth in its lifetime.

Field Identification & Locations

Identified by its slender, tapering conical shape and smooth, hard enameloid surface. Often found in phosphate mines, coastal riverbeds, and sedimentary exposures in Morocco and the SE United States.

Identified on: 5/2/2026

Mode: Standard