fossil

Weathered fossil shell fragment

Indeterminate bioclastic carbonate, likely molluscan shell (calcium carbonate, commonly aragonite or calcite)

AI-generated identification · may be incorrect

Cream-tan, porous, irregularly rounded fragment with small cavities and possible shell texture; likely Mohs 3–4, dull to slightly waxy luster, and no visible crystal cleavage. Exact identification is limited by the small, worn specimen and image resolution.

Identified September 4, 2026More fossil →

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At a glance

Common name: Weathered fossil shell fragment
Scientific name: Indeterminate bioclastic carbonate, likely molluscan shell (calcium carbonate, commonly aragonite or calcite)
Category: fossil
Identified: September 4, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an unidentified fragment; higher value requires a confirmed species, locality, age, and exceptional preservation.

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

Formed as a marine or freshwater organism secreted a carbonate shell, followed by burial, mineral alteration, and weathering; age cannot be determined visually and may range from Recent to Paleozoic.

Uses & applications

Primarily a teaching or collecting specimen; fossilized carbonate material may be used decoratively, but this piece has little practical industrial value.

Geological facts

The holes may represent original shell pores, dissolution cavities, or boring traces made by marine organisms; a laboratory examination would distinguish fossil shell from ordinary porous limestone.

Field identification & locations

Common in sedimentary rocks and coastal deposits worldwide; inspect for repeating biological symmetry, growth lines, chambering, or shell microstructure, and avoid acid testing if preservation is important.