sedimentary

Hag Stone

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

Hardness typically varies by mineral composition (Mohs 3-7 depending on host rock); brown, gray, or tan color; dull to earthy luster; amorphous crystal structure due to weathering; no distinct cleavage; specific gravity averages 2.5 to 2.7.

Identified August 1, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed naturally through selective water erosion, where acidic water or wave action constantly swirling against a softer mineral inclusion or fossil within a sedimentary rock wears completely through it over thousands to millions of years.

Uses & applications

Historically used as a protective talisman or amulet in folklore to ward off evil spirits, nightmares, and witches. Today, popular among collectors, pagan practitioners, and for decorative or holistic jewelry.

Geological facts

Also known as adder stones, hole stones, witch stones, or holy stones. According to folklore, looking through the hole of a hag stone allows the bearer to see fairies, spirits, or hidden treasures.

Field identification & locations

Easily identified by a naturally formed hole entirely through the rock. Commonly found along riverbeds, rocky beaches, and streams where constant water action creates the perforation. Look for stones with smooth, water-worn edges inside the hole.

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Banded Siltstone / Mudstone Pebble

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