Rock Identifier
Fossilized Shell (Invertebrate fossil (phylum Mollusca)) — fossil
fossil

Fossilized Shell

Invertebrate fossil (phylum Mollusca)

AI-generated identification · may be incorrect

Hardness varies by mineral replacement, typically Mohs 3-4 for calcite. Colors range from amber brown to grey. Luster is vitreous to dull.

Identified More fossil →
Explore Fossilized Shell in the encyclopedia →

Identify your own rocks.

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

App StoreGoogle Play

Physical properties

Hardness varies by mineral replacement, typically Mohs 3-4 for calcite. Colors range from amber brown to grey. Luster is vitreous to dull.

Formation & geological history

Formed through permineralization or replacement of original shell material by minerals like calcite or silica in marine sedimentary environments over millions of years.

Uses & applications

Used in educational exhibits, paleontological research, and decorative shell collecting.

Geological facts

Coastal North Carolina features extensive sedimentary deposits containing fossilized marine invertebrates from the Cenozoic era.

Field identification & locations

Found along beaches and riverbanks in sedimentary strata. Identify by distinct organic shell contours preserved in stone.

More like this

Other fossil specimens

Probable fossil-bearing rock or mineral concretion (Unidentified carbonate-rich concretion with a possible fossil inclusion) — fossil

Probable fossil-bearing rock or mineral concretion

Unidentified carbonate-rich concretion with a possible fossil inclusion

fossil
Likely fossil oyster shell (Fossilized bivalve shell; exact species cannot be identified from the image) — fossil

Likely fossil oyster shell

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

fossil
Crinoid Stem Fossil in Matrix (Phylum Echinodermata, Class Crinoidea) — fossil

Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

fossil
Fossiliferous limestone (likely a crinoidal or shell-fragment limestone) (Bioclastic limestone, composed chiefly of calcite (CaCO₃)) — sedimentary

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

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

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

Porous limestone pebble

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

sedimentary
Weathered fossil bone fragment (identification uncertain) (Fossilized bone; exact taxon and mineral composition cannot be determined from the image) — fossil

Weathered fossil bone fragment (identification uncertain)

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

fossil