sedimentary
Hag Stone
Perforated sedimentary rock (typically sandstone or limestone)
Hardness varies from 3 to 7 depending on mineral composition (sandstone/limestone); Color ranges from tan, brown, to grey; Luster is dull or earthy; No specific crystal structure as it is a rock rather than a pure mineral; Cleavage is variable.
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Physical properties
Hardness varies from 3 to 7 depending on mineral composition (sandstone/limestone); Color ranges from tan, brown, to grey; Luster is dull or earthy; No specific crystal structure as it is a rock rather than a pure mineral; Cleavage is variable.
Formation & geological history
Formed naturally through erosion, where water (often containing acidic properties or sand) continually swirls against a weaker spot in a sedimentary rock, eventually boring a hole through it. These can be found in riverbeds, along coastlines, or in glacial till.
Uses & applications
Primarily of interest to rock collectors, folk magic practitioners, and history enthusiasts. Historically used as talismans or amulets for protection.
Geological facts
Also known as an adder stone, witch stone, or holy stone, hag stones have a rich history in folklore where they were believed to ward off evil spirits, witches, and nightmares, or allow the holder to see through faerie realms.
Field identification & locations
Identified easily by the natural hole or perforation cleanly through the stone. Commonly found washed up on beaches, riverbanks, or gravel beds where water erosion is prominent.
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