sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Quartzite or Sandstone)

AI-generated identification · may be incorrect

Hardness varies from 6 to 7 on the Mohs scale depending on mineral content. Colors range from tan, grey, to white with a dull to vitreous luster and a smooth, water-worn texture featuring a naturally formed hole.

Identified November 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through intense water erosion, where swirling currents and acidic water bore through weaker mineral veins in a sedimentary rock over thousands of years.

Uses & applications

Historically used as a protective talisman in folklore and occasionally collected as a curiosity or good luck charm.

Geological facts

Also known as adder stones or holy stones, folklore suggests looking through the natural hole allows the viewer to see fairies and supernatural beings.

Field identification & locations

Found along riverbeds, lakeshores, and ocean beaches where tumbling action persists; identified by the distinct natural perforation passing entirely through the stone.