sedimentary

Hag stone

Perforated sedimentary rock (typically flint, chert, or limestone)

AI-generated identification · may be incorrect

Hardness varies from 3 to 7 on the Mohs scale depending on composition; colors range from tan to grey with a dull or earthy luster; features a naturally occurring hole bored by water erosion or softer inclusions weathering away.

Identified November 5, 2026More sedimentary →

Explore Hag stone 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

Formed through prolonged water erosion, wave action, or chemical weathering on sedimentary rock formations over thousands to millions of years.

Uses & applications

Historically used as a protective talisman or amulet in folklore; currently valued as a curiosity by collectors and for decorative or metaphysical purposes.

Geological facts

Folklore often attributes magical properties to hag stones, such as the ability to see through faerie realms or ward off evil spirits when looked through.