mineral
Fulgurite
Fulgurite (Lechatelierite/Silica glass)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, typically brown to tan or black, vitreous to greasy luster, amorphous crystal structure.
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Physical properties
Hardness of 6-7 on the Mohs scale, typically brown to tan or black, vitreous to greasy luster, amorphous crystal structure.
Formation & geological history
Formed instantly when lightning strikes silica-rich sand or soil, fusing the grains at temperatures exceeding 1,800 degrees Celsius.
Uses & applications
Prized by collectors and researchers for studying ancient atmospheric conditions and lightning strikes.
Geological facts
Often called 'petrified lightning', fulgurites can preserve hollow tubes showing the exact path of the electrical discharge.
Field identification & locations
Found in sandy deserts or beaches globally; identified by its fragile, glass-lined tubular structure.
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