fossil

Fossilized Shell Fragment

Bivalvia or Gastropoda (depending on original organism)

AI-generated identification · may be incorrect

Hardness: Varies (often 3-4 if calcitic/aragonitic), Color: White, tan, brown, Luster: Earthy to sub-vitreous, Crystal structure: Microcrystalline (calcium carbonate)

Identified August 23, 2026More fossil →

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Physical properties

Hardness: Varies (often 3-4 if calcitic/aragonitic), Color: White, tan, brown, Luster: Earthy to sub-vitreous, Crystal structure: Microcrystalline (calcium carbonate)

Formation & geological history

Formed through permineralization or recrystallization of marine invertebrate shells in sedimentary environments. Age varies widely.

Uses & applications

Educational, scientific study, sometimes minor lapidary use or basic collecting.

Geological facts

Shell fragments are among the most common fossils found in sedimentary rocks worldwide, providing clues about ancient marine ecosystems.

Field identification & locations

Identified by the distinct curved shape, layered structure, and sometimes remaining ornamentation of the original shell. Found in sedimentary deposits, beaches, and eroded cliffs.