sedimentary

Gastropod Fossil (Snail)

Gastropoda (Internal mold/Steinkern)

AI-generated identification · may be incorrect

Hardness: 3-4 (if calcified/limestone); Color: tan, brown, or ochre; Luster: dull to earthy; Structure: spiral or coiled shell shape; Cleavage: none.

Hardness: 3-4 (if calcified/limestone)
Color: tan, brown, or ochre
Luster: dull to earthy

Identified June 25, 2026More sedimentary →

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Physical properties

Hardness: 3-4 (if calcified/limestone); Color: tan, brown, or ochre; Luster: dull to earthy; Structure: spiral or coiled shell shape; Cleavage: none.

Formation & geological history

Formed during the process of permineralization or as an internal mold (steinkern) where sediment fills the shell of a prehistoric sea snail and hardens into stone over millions of years. Commonly found in sedimentary basins dating from the Paleozoic to the Cenozoic eras.

Uses & applications

Primarily used for educational purposes, paleontological study, and as a popular entry-level collector's item. Larger or more unique specimens may be used in jewelry or home decor.

Geological facts

Gastropods are one of the most successful groups of animals, with a fossil record spanning over 500 million years. This specific specimen appears to be an internal mold, representing the sediment that filled the shell rather than the shell material itself.

Field identification & locations

Identify by the distinct spiral coiling pattern. To find them, search in limestone or shale outcrops where ancient seas once existed. They are often found in gravel pits or beach erosion areas.