sedimentary

Hag Stone

Perforated Sedimentary Rock (primarily Siltstone or Mudstone)

AI-generated identification · may be incorrect

Hardness: 3-5 (Mohs scale); Color: Yellow-orange to earthy tan; Luster: Dull/Earthy; Structure: Clastic; Features: Natural perforation caused by water erosion or boring organisms.

Hardness: 3-5 (Mohs scale)
Color: Yellow-orange to earthy tan
Luster: Dull/Earthy

Identified May 25, 2026More sedimentary →

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Physical properties

Hardness: 3-5 (Mohs scale); Color: Yellow-orange to earthy tan; Luster: Dull/Earthy; Structure: Clastic; Features: Natural perforation caused by water erosion or boring organisms.

Formation & geological history

Formed through the accumulation and litification of fine-grained sediments in aqueous environments. The characteristic hole is typically eroded over hundreds of years by water currents, small tumbling pebbles, or the boring activity of marine mollusks like Pholadidae.

Uses & applications

Traditionally used as a protective talisman or 'witch stone' in folklore; currently popular for beachcomber collections, jewelry, and spiritual practices.

Geological facts

In European folklore, looking through the hole of a hag stone was believed to reveal the invisible world of faeries, hidden spirits, or to ward off the 'Evil Eye.' They are often hung above doors for protection.

Field identification & locations

Identify in the field by looking for stones with a smooth, naturally occurring hole that passes entirely through. Commonly found on beaches, riverbeds, and coastal regions with significant wave action.