fossil

Fossil gastropod (snail)

Fossilized gastropod shell, likely a marine mollusk; exact genus cannot be determined from the image

AI-generated identification · may be incorrect

A coiled, chambered shell with preserved spiral form and weathered mineral infill; original aragonite/calcite is partly replaced by calcite and iron-bearing minerals. Fossil hardness is typically about 3–4 Mohs, with dull to subvitreous luster and no diagnostic cleavage.

Identified August 16, 2026More fossil →

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Physical properties

Formation & geological history

Formed when a snail shell was buried in marine sediment and mineralized during diagenesis, commonly in Paleozoic–Cenozoic limestone. The surrounding gray-white material appears to be carbonate matrix.

Uses & applications

Primarily a collecting, educational, and decorative specimen; polished or prepared fossils may be used in jewelry and display pieces.

Geological facts

The visible spiral and growth pattern are characteristic of gastropods, but the internal mineral-filled cavity can obscure the original shell structure.

Field identification & locations

Common in fossiliferous limestone and marine sedimentary formations worldwide. Identify it by its continuous spiral shell, tapering whorls, and carbonate matrix; dilute acid should be avoided because it can damage calcite fossils. Typical value is $10–$75, or $100+ if unusually complete, well-prepared, or scientifically important.