sedimentary
Hag Stone
Perforated Sedimentary Rock
AI-generated identification · may be incorrectHardness varies from 6 to 7 depending on mineral content, typically displays earthy or dull luster with a naturally occurring hole bored through the center by water erosion or acid dissolution.
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Physical properties
Hardness varies from 6 to 7 depending on mineral content, typically displays earthy or dull luster with a naturally occurring hole bored through the center by water erosion or acid dissolution.
Formation & geological history
Formed through the continuous abrasive action of running water, wave action, or acidic groundwater dissolving softer inclusions over thousands to millions of years.
Uses & applications
Historically used as protective talismans or amulets against evil spirits, and commonly collected as curiosities.
Geological facts
Also known as adder stones or witch stones, folklore attributes mystical protective powers to these naturally perforated rocks across many cultures.
Field identification & locations
Easily identified by the complete natural hole passing through the stone; frequently found along riverbanks, beaches, and stream beds.
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