Rock Identifier
Likely fossil tooth or tooth fragment (Indeterminate fossilized vertebrate tooth; possibly shark or marine reptile, identification uncertain from the image) — fossil
fossil

Likely fossil tooth or tooth fragment

Indeterminate fossilized vertebrate tooth; possibly shark or marine reptile, identification uncertain from the image

AI-generated identification · may be incorrect

Tapered, tooth-like form with cream, yellow, and bluish-gray coloration; surface appears mineralized and slightly lustrous. Hardness is likely about 5–7 Mohs, but exact composition and specific gravity cannot be determined visually.

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Physical properties

Tapered, tooth-like form with cream, yellow, and bluish-gray coloration; surface appears mineralized and slightly lustrous. Hardness is likely about 5–7 Mohs, but exact composition and specific gravity cannot be determined visually.

Formation & geological history

A biological tooth was buried and mineralized during diagenesis, potentially in marine sediment; age may range from millions to tens of millions of years. The visible layered or striated texture may reflect enamel, dentine, or replacement minerals.

Uses & applications

Primarily a collectible, educational specimen, or display piece; fossil teeth are sometimes used in jewelry. Commercial value depends strongly on species, completeness, provenance, and preparation quality.

Geological facts

The pointed, asymmetrical shape resembles a tooth more than a conventional rock or crystal. Color alone is not diagnostic because fossilization can replace original tissues with silica, calcite, or iron minerals.

Field identification & locations

Check for enamel-like smoothness, a distinct root, internal dentine, and consistent mineralization; a magnifier and hardness test can help, though testing may damage it. Common sources include marine fossil beds and river gravels.