fossil

Fossiliferous limestone with a shell fossil

Bioclastic limestone containing a probable bivalve or brachiopod fossil; exact identification is not possible from the image alone.

AI-generated identification · may be incorrect

Pale gray-beige, fine-grained carbonate matrix with a raised, ribbed fossil. Calcite is Mohs 3, typically has a vitreous-to-dull luster and rhombohedral cleavage; the shell’s original material may be partly replaced by calcite.

Identified October 3, 2026More fossil →

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At a glance

Common name: Fossiliferous limestone with a shell fossil
Scientific name: Bioclastic limestone containing a probable bivalve or brachiopod fossil; exact identification is not possible from the image alone.
Category: fossil
Identified: October 3, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small, common fossil-bearing piece; more if professionally prepared or unusually well preserved.

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

Shells accumulated in a marine environment and were buried, compacted, and cemented into limestone; fossil age cannot be determined visually and may range from hundreds of millions of years to much younger.

Uses & applications

Limestone is used for cement, aggregate, and building stone; intact fossils are collected and displayed.

Geological facts

The specimen appears to preserve an articulated or strongly molded ribbed shell, but finer details are obscured by weathering and matrix.

Field identification & locations

Look for repeated ribs, bilateral shell symmetry, and a distinct shell boundary against the surrounding rock; fossiliferous limestone occurs in marine sedimentary formations worldwide.