fossil

Fossil bivalve shell fragment

Likely a ribbed oyster or scallop-type bivalve; exact genus requires locality and preservation details

AI-generated identification · may be incorrect

Calcitic shell, white to pale gray with strong radial ribs, layered/fibrous texture, dull to pearly luster, and hardness about 3–4 Mohs; the visible piece appears naturally weathered and broken.

Identified August 18, 2026More fossil →

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At a glance

Common name: Fossil bivalve shell fragment
Scientific name: Likely a ribbed oyster or scallop-type bivalve; exact genus requires locality and preservation details
Category: fossil
Identified: August 18, 2026
Method: Standard

AI Estimated Value

Typically $1–$15 for a common fragment; $20–$100+ if complete, well-preserved, diagnostically identifiable, or from a notable fossil locality.

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

Calcitic shell, white to pale gray with strong radial ribs, layered/fibrous texture, dull to pearly luster, and hardness about 3–4 Mohs; the visible piece appears naturally weathered and broken.

Formation & geological history

Formed by a marine mollusk that secreted calcium-carbonate shell; burial, lithification, and later erosion exposed it. Its geological age cannot be determined from the image, but similar beach specimens may range from modern to Cenozoic.

Uses & applications

Primarily a collecting and educational specimen; fossil shells are also used in exhibits and décor, while powdered fossil shell can have industrial uses.

Geological facts

The radiating ribs strengthened the shell against waves and predators. The specimen is more consistent with fossil or subfossil shell than with a crystalline mineral or ordinary rock.

Field identification & locations

Identify by radial symmetry/ribs, shell layering, and absence of mineral crystal faces; compare both valves and check locality records. Common along marine beaches, shell beds, and sedimentary exposures worldwide.