Rock Identifier
Fossilized Gastropod Steinkern (Gastropoda internal mold) — fossil
fossil

Fossilized Gastropod Steinkern

Gastropoda internal mold

AI-generated identification · may be incorrect

Hardness 7 on Mohs scale (due to quartz replacement), beige to light brown color, dull to vitreous luster, amorphous internal mold structure with distinct spiral whorl impressions.

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Physical properties

Hardness 7 on Mohs scale (due to quartz replacement), beige to light brown color, dull to vitreous luster, amorphous internal mold structure with distinct spiral whorl impressions.

Formation & geological history

Formed when a snail shell was buried in sediment, filled with mineral-rich water, and the original shell dissolved while the interior hardened into rock over millions of years.

Uses & applications

Used primarily as educational specimens, cabinet display pieces, and for paleontological study.

Geological facts

This specimen is a steinkern, meaning it represents the internal cast of the shell rather than the shell itself. They are commonly found in limestone and marine sedimentary deposits worldwide.

Field identification & locations

Identify by its distinctive coiled, spiral shape and granular sedimentary matrix. Look for them in ancient marine strata, riverbeds, and construction gravel.

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