Fossilized Stingray Mouth Plate

Physical Properties

Hardness: 3-5 (Mohs), Color: Charcoal black to dark brown due to permineralization, Luster: Dull to sub-vitreous, Structure: Parallel rows of hexagonal or rectangular pavement-like bars.

Formation & Geological History

Formed during the Eocene to Pliocene epochs (approximately 50 million to 2 million years ago) when shark and ray teeth were buried in marine sediments and underwent permineralization.

Uses & Applications

Primarily used by collectors for educational purposes or as jewelry (wire-wraps and pendants). They have significant paleontological value for understanding ancient marine ecosystems.

Geological Facts

Stingrays have flat, plate-like teeth arranged in a pavement-like structure to crush the shells of mollusks and crustaceans. Florida is one of the world's most productive locations for finding these fossils.

Field Identification & Locations

Identify by looking for a cross-hatched or barred texture that resembles a tire tread or basket weave. Found commonly on Gulf Coast and Atlantic beaches in Florida after storms or dredging.

Identified on: 5/10/2026

Mode: Standard