fossil

Crinoid Stem Fossil

Crinoid columnal

Hardness of 3-4 on Mohs scale, grayish to brown color, dull to vitreous luster, composed of calcite with distinctive circular or pentagonal symmetry.

Identified November 8, 2026More fossil →

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Physical properties

Hardness of 3-4 on Mohs scale, grayish to brown color, dull to vitreous luster, composed of calcite with distinctive circular or pentagonal symmetry.

Formed from the fossilized segments of marine echinoderm stems dating primarily from the Paleozoic era.

Collected by fossil enthusiasts and occasionally used in educational displays or jewelry.

Commonly known as 'Indian beads' or 'saint's beads' in folklore, these fossils often weather out of limestone beds.

Identify by their distinct disk shapes and internal radial patterns; found globally in ancient marine sedimentary rocks.

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

Fossil oyster shell

Oyster (family Ostreidae); shell composed chiefly of calcite (CaCO₃)