fossil

Land Snail Shell

Gastropoda (Calcium Carbonate, CaCO3)

AI-generated identification · may be incorrect

Hardness: 3-4 (Mohs), Color: White to tan, Luster: Dull/Pearlaceous, Crystal Structure: Orthorhombic/Hexagonal, Specific Gravity: 2.7-2.9

Identified July 1, 2026More fossil →

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Physical properties

Hardness: 3-4 (Mohs), Color: White to tan, Luster: Dull/Pearlaceous, Crystal Structure: Orthorhombic/Hexagonal, Specific Gravity: 2.7-2.9

Formation & geological history

Biogenic formation involving the secretion of calcium carbonate by a mollusk mantle; common in terrestrial environments during the Holocene epoch.

Uses & applications

Scientific study of paleoenvironments, decorative crafts, and contributing to soil calcium levels upon decomposition.

Geological facts

Snail shells are primarily made of aragonite or calcite. While this is a modern biological specimen, many similar shells are found as subfossils in limestone deposits.

Field identification & locations

Identified by its spiral (helical) structure and hollow interior. Common in gardens, forests, and damp limestone-rich areas.

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Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

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

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

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

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Rounded sedimentary pebble

Likely micritic limestone or calcareous sandstone

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