mineral
Fulgurite
Lechatelierite / Vitreous Silica (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on Mohs scale, grayish-brown to tan color, vitreous to dull luster, amorphous crystal structure, specific gravity around 2.2.
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Physical properties
Hardness of 6.5-7 on Mohs scale, grayish-brown to tan color, vitreous to dull luster, amorphous crystal structure, specific gravity around 2.2.
Formation & geological history
Formed when lightning strikes sand or soil, instantly melting and fusing quartz grains together at temperatures exceeding 1,500°C.
Uses & applications
Valued by collectors and researchers studying ancient atmospheric conditions and lightning strikes.
Geological facts
Often called 'fossilized lightning,' fulgurites preserve hollow glass tubes where vaporized steam and gases escaped during the strike.
Field identification & locations
Identified by its hollow, glassy-lined interior and fragile, sandy exterior crust, typically found in desert sand dunes and beaches.
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