fossil

Fossil Shell

Gastropoda

Hardness 3.5-4 on Mohs scale, varying cream and yellowish coloration, pearly to vitreous luster, calcitic crystal structure.

Identified October 30, 2026More fossil →

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Physical properties

Hardness 3.5-4 on Mohs scale, varying cream and yellowish coloration, pearly to vitreous luster, calcitic crystal structure.

Formed through the fossilization of marine mollusk shells embedded in sedimentary rock layers over millions of years.

Used primarily in fossil collecting, educational displays, and decorative jewelry.

Gastropod fossils provide crucial evidence for paleoenvironmental reconstructions and ancient marine biodiversity.

Identified by spiral whorls and distinctive ornamentation; commonly found in marine sedimentary 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