fossil

Fossilized shell or brachiopod

Likely a calcareous brachiopod or bivalve fossil; exact identification requires clearer detail and scale

AI-generated identification · may be incorrect

Pale beige, rounded, weathered specimen with raised ribbing and bilateral shell-like ornamentation; likely calcite or recrystallized calcium carbonate, Mohs hardness about 3, dull to lightly waxy luster, and possible cleavage.…

Identified August 12, 2026More fossil →

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At a glance

Common name: Fossilized shell or brachiopod
Scientific name: Likely a calcareous brachiopod or bivalve fossil; exact identification requires clearer detail and scale
Category: fossil
Identified: August 12, 2026
Method: Standard

AI Estimated Value

About $5-$30 for a common loose fossil; $30-$150 or more for an unusually complete, well-prepared, or locality-documented specimen.

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

Originally formed as a marine shell, then buried in carbonate-rich sediment and mineralized during diagenesis. Most such fossils range from Paleozoic to Mesozoic age, but age cannot be determined from the image alone.

Uses & applications

Primarily a teaching, display, and collecting specimen; fossiliferous limestone may also be used as aggregate or building stone, but this individual has no industrial use.

Geological facts

Brachiopods resemble clams but have shells with symmetry through each valve rather than between the valves. Fine surface detail may have been partly erased by abrasion, weathering, or polishing.

Field identification & locations

Look for shell symmetry, growth lines, ribs, and a natural mold or internal cast; a vinegar test can indicate calcite but may damage the specimen. Common sources include marine limestones in North America, Europe, North Africa, and China.