fossil

Fossil gastropod (snail shell)

Gastropoda; likely a small spiral shell preserved/replaced by calcium carbonate

AI-generated identification · may be incorrect

Small, tightly coiled planispiral specimen with concentric whorls and a tan, subtly translucent surface. Original shell is commonly aragonite or calcite; hardness about 3–4 Mohs, vitreous to pearly luster, and low-to-moderate density.

Identified September 5, 2026More fossil →

Explore Fossil gastropod (snail shell) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

A marine or freshwater snail shell accumulated in sediment and later mineralized or preserved during burial. Exact age cannot be determined from the photograph; the coastal Washington region contains young marine and terrestrial fossil-bearing deposits.

Uses & applications

Primarily a collectible or educational specimen; not normally used in construction or jewelry, though polished fossil shells may be ornamental.

Geological facts

The visible spiral is the shell’s coiling pattern, not crystal growth. The specimen appears natural rather than a mineral crystal, but its identity is limited by its small size and lack of a side/profile view.

Field identification & locations

Likely a fossil shell found near 47.0°N, 124.2°W, where marine sedimentary deposits make this plausible. Confirm with a hand lens: look for a distinct aperture, raised whorls, shell growth lines, and possible chamber or umbilicus; vinegar fizz would indicate exposed carbonate but can damage it.