fossil

Fossilized scallop shell

Bivalve shell, likely a scallop (family Pectinidae); shell composed chiefly of calcite and/or aragonite (CaCO₃)

AI-generated identification · may be incorrect

Ribbed, fan-shaped shell with cream, tan, and pink coloration; calcite/aragonite hardness about 3–4 Mohs, typically pearly to dull luster. The image shows a single shell valve; crystal structure cannot be determined visually.

Identified September 26, 2026More fossil →

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Physical properties

Formation & geological history

Scallops grew shells in marine environments; fossilization occurred when shells were buried and preserved or mineral-replaced in sediment. The specimen’s geological age cannot be established from the image alone.

Uses & applications

Collected as a natural-history specimen and used in education or display; scallop shells are also used decoratively and in crafts.

Geological facts

Scallop ribs strengthen the shell, and living scallops can swim by rapidly clapping their valves.

Field identification & locations

Identify by its fan shape, radiating ribs, and hinge-area ‘ears’; fossil shells commonly occur in marine sedimentary rocks worldwide. A locality or matrix would help confirm whether this is fossilized rather than a modern shell.