fossil

Fossilized gastropod shell

Fossil Mollusca, class Gastropoda; likely a mineral-replaced or partially silicified shell

AI-generated identification · may be incorrect

Cream to tan, layered/coiled morphology with a visible shell aperture and weathered, earthy luster; hardness is approximately 3–7 depending on calcite preservation versus silica replacement. Original shell material was aragonite or calcite, with possible calcite, silica, or iron-oxide infill.

Identified September 12, 2026More fossil →

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Physical properties

Formation & geological history

A marine or freshwater snail shell was buried in sediment, then lithified and mineralized during diagenesis, commonly over millions of years. Exact age and species require locality and microscopic examination.

Uses & applications

Primarily a collector, educational, or decorative specimen; not generally used in construction or jewelry. Value depends on rarity, preservation, size, and verified provenance.

Geological facts

The spiral whorls and opening are characteristic of gastropods, which evolved in the Cambrian and remain abundant today. The specimen appears naturally weathered or prepared rather than being an ordinary modern shell.

Field identification & locations

Identify it by the coiled whorls, growth lines, and fossilized texture; acid testing should be avoided because it may damage the specimen. Common fossil gastropods occur in limestone and shale worldwide, including the United States, Europe, and North Africa.