fossil

Fossilized Gastropod

Gastropoda

Hardness 3-4 on Mohs scale, typically white to brownish-gray, vitreous to dull luster, spiral or whorled shell structure.

Identified October 17, 2026More fossil →

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Physical properties

Hardness 3-4 on Mohs scale, typically white to brownish-gray, vitreous to dull luster, spiral or whorled shell structure.

Formed through the permineralization or replacement of ancient snail shells in sedimentary environments over millions of years.

Valued primarily for fossil collecting, educational displays, and occasionally in decorative jewelry.

Gastropods are among the most successful animal groups, with a fossil record stretching back over 500 million years to the Cambrian period.

Identified by distinctive coiled whorls and typically found embedded in sedimentary limestone or shale deposits worldwide.

Probable fossil-bearing rock or mineral concretion

Unidentified carbonate-rich concretion with a possible fossil inclusion

Likely fossil oyster shell

Fossilized bivalve shell; exact species cannot be identified from the image

Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

Fossiliferous limestone (likely a crinoidal or shell-fragment limestone)

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

Porous limestone pebble

Calcite-rich limestone (primarily CaCO₃); exact identification is uncertain from the image

Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image