fossil

Coprolite

Fossilized feces

Hardness varies around 4-5 on the Mohs scale, typically brown to black in color, dull to waxy luster, amorphous crystal structure.

Identified November 11, 2026More fossil →

Get a report just like this from any photo, free.

Physical properties

Hardness varies around 4-5 on the Mohs scale, typically brown to black in color, dull to waxy luster, amorphous crystal structure.

Formed through the fossilization of animal dung via permineralization, often preserving dietary traces like bone fragments and scales.

Valued by paleontologists for studying ancient diets and ecosystems, and collected as a unique geological curiosity.

Coprolites provide direct evidence of ancient predator-prey relationships and prehistoric environments.

Identified by its distinctive shape and internal organic inclusions, found in sedimentary strata 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