mineral
Fulgurite
Fulgurite (Lechatelierite/Fused Quartz Sand)
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale, grayish-white or tan color, vitreous to dull luster, amorphous crystal structure, brittle.
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Physical properties
Hardness 6-7 on Mohs scale, grayish-white or tan color, vitreous to dull luster, amorphous crystal structure, brittle.
Formation & geological history
Formed when lightning strikes sand or soil, instantly melting and fusing silica grains at temperatures exceeding 1,800 degrees Celsius.
Uses & applications
Used primarily as educational specimens, scientific research on ancient lightning strikes, and rare collector items.
Geological facts
Also known as 'petrified lightning', fulgurites preserve ancient atmospheric conditions and electrical discharges inside hollow glass tubes.
Field identification & locations
Found in sandy deserts, beaches, or mountain peaks prone to frequent thunderstorms. Identified by hollow, glass-lined internal tubes.
