sedimentary
Hag Stone
Perforated Quartzite or Sedimentary Pebble
AI-generated identification · may be incorrectHardness 7 on Mohs scale, white to tan coloration, vitreous luster, amorphous to crypto-crystalline structure, specific gravity around 2.65.
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Physical properties
Hardness 7 on Mohs scale, white to tan coloration, vitreous luster, amorphous to crypto-crystalline structure, specific gravity around 2.65.
Formation & geological history
Formed through natural water erosion and wave action wearing away a softer inclusion or fossil within a harder rock matrix over thousands to millions of years.
Uses & applications
Historically used as a protective talisman or amulet in folklore; valued primarily as a curiosity by rockhounds and collectors.
Geological facts
Also known as adder stones, witch stones, or hole stones, these naturally perforated rocks were traditionally believed in folklore to ward off evil or grant sight of the fae.
Field identification & locations
Found along riverbeds, lakeshores, and beaches where wave or current action constantly tumbles rocks. Identified by the distinct natural hole completely piercing the stone.
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