fossil

Weathered fossil shell fragment

Likely a fossilized bivalve or gastropod fragment; exact taxon cannot be determined from one view

AI-generated identification · may be incorrect

Pale gray-green, fine-grained, matte to slightly earthy luster, with curved growth lines and possible shell-layer structure. Fossilized carbonate material is commonly calcite; hardness about 3 Mohs, with possible effervescence in dilute hydrochloric acid.

Identified September 13, 2026More fossil →

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At a glance

Common name: Weathered fossil shell fragment
Scientific name: Likely a fossilized bivalve or gastropod fragment; exact taxon cannot be determined from one view
Category: fossil
Identified: September 13, 2026
Method: Standard

AI Estimated Value

About $5–$30 USD if common and unidentified; $30–$150+ if exceptionally preserved, legally collected, or taxonomically identified.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

A marine mollusk shell was buried in sediment and mineralized or recrystallized during diagenesis, likely in a Paleozoic–Cenozoic sedimentary deposit. The tapered shape and concentric ridges indicate preserved shell growth rather than an igneous or metamorphic texture.

Uses & applications

Primarily a collecting, educational, or decorative specimen; it has no significant industrial value unless part of a larger fossil-bearing limestone deposit.

Geological facts

The visible ridges are growth increments, and the pale color may reflect weathering or mineral replacement. Identification would improve with the opposite side, scale, locality, and a photo of the hinge or aperture.

Field identification & locations

Look for repeated shell symmetry, growth lines, layered carbonate texture, and sedimentary matrix; test cautiously for acid reaction. Common in marine limestones and shales worldwide, including North American Paleozoic and Cenozoic formations.