fossil

Fossiliferous limestone with a coiled gastropod fossil

Gastropod fossil preserved in calcitic limestone; the exact fossil taxon cannot be determined from the image

AI-generated identification · may be incorrect

Pale beige, fine-grained carbonate rock with a visible spiral shell impression or fossil. Limestone is mainly calcite (Mohs 3; trigonal crystal system; vitreous to dull luster); the fossil appears mineralized or preserved as a contrasting calcitic feature.

Identified September 29, 2026More fossil →

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At a glance

Common name: Fossiliferous limestone with a coiled gastropod fossil
Scientific name: Gastropod fossil preserved in calcitic limestone; the exact fossil taxon cannot be determined from the image
Category: fossil
Identified: September 29, 2026
Method: Standard

AI Estimated Value

About $5–$30 USD for a small, common specimen; more if the fossil is unusually complete, identifiable, or from a documented 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

Formation & geological history

Formed from carbonate sediment accumulating in a marine environment, with shell remains buried and lithified; likely from the Phanerozoic, but age cannot be established from appearance alone.

Uses & applications

Primarily a teaching, display, or collecting specimen; limestone is also widely used in cement, lime, and building materials.

Geological facts

The prominent coiled form is characteristic of many marine gastropods, though similar spiral fossils can require close examination for identification.

Field identification & locations

Look for the spiral whorl and shell growth pattern embedded in carbonate rock; fossiliferous limestone occurs in marine sedimentary formations worldwide. Avoid acids or abrasive cleaning, which can damage the fossil.