mineral
Fairy Stone
Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)
AI-generated identification · may be incorrectHardness of 7 to 7.5 on the Mohs scale, typically brown to reddish-brown in color, with a vitreous to resinous luster. It exhibits a monoclinic crystal system and often forms distinctive cruciform twin crystals.
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Physical properties
Hardness of 7 to 7.5 on the Mohs scale, typically brown to reddish-brown in color, with a vitreous to resinous luster. It exhibits a monoclinic crystal system and often forms distinctive cruciform twin crystals.
Formation & geological history
Formed through regional metamorphism of aluminum-rich pelitic rocks, typically schists and gneisses, during mountain-building processes.
Uses & applications
Used primarily as a collector's mineral, talisman, or in unique jewelry pieces due to its natural cross shape.
Geological facts
Also known as cross stones, they are steeped in folklore and traditionally worn as protective amulets. The cruciform shape results from a 60-degree or 90-degree penetration twinning of crystals.
Field identification & locations
Easily identified in the field by its distinct natural cross or X-shaped twinning formations. Commonly found in metamorphic terrains worldwide, particularly in Virginia, USA, and various European localities.
