fossil

Shell fossil or shell fragment

Likely a bivalve shell, composed mainly of calcium carbonate (aragonite/calcite); exact species cannot be determined from one photo

AI-generated identification · may be incorrect

Cream-white, thin, layered and slightly curved with pearly-to-dull luster. Likely Mohs hardness about 3–4, low specific gravity around 2.6–2.9, and shell-like lamination rather than crystal cleavage.

Identified September 16, 2026More fossil →

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At a glance

Common name: Shell fossil or shell fragment
Scientific name: Likely a bivalve shell, composed mainly of calcium carbonate (aragonite/calcite); exact species cannot be determined from one photo
Category: fossil
Identified: September 16, 2026
Method: Standard

AI Estimated Value

About $0–$10 for a common fragment; more if identified as a complete, unusual, or well-preserved fossil.

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 biological carbonate shell formed by a marine or freshwater mollusk, then buried and variably mineralized. It may be modern/subrecent rather than fossilized; the image does not show enough matrix or mineral replacement to establish its age.

Uses & applications

Useful mainly as a teaching or decorative specimen; powdered shell can serve as a calcium-carbonate source, though this small piece has negligible commercial value.

Geological facts

The smooth inner surface and layered edge strongly favor shell material over a crystalline mineral such as quartz or calcite. The shiny patch may be preserved nacre or simply flash reflection.

Field identification & locations

Commonly found in beaches, river deposits, coastal sediments, and raised marine terraces. Check for growth lines, hinge teeth, and a distinct shell exterior; vinegar would cause mild fizzing, but testing may damage it. The reported Somali-region location is compatible with carbonate shell material.