mineraloid
Fulgurite
Lechatelierite
AI-generated identification · may be incorrectHardness of 5.5 to 6 on the Mohs scale, typically brown to grayish-black color, glassy or vitreous luster, and an amorphous crystal structure.
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Physical properties
Hardness of 5.5 to 6 on the Mohs scale, typically brown to grayish-black color, glassy or vitreous luster, and an amorphous crystal structure.
Formation & geological history
Formed when lightning strikes sand or soil, instantly melting quartz and fusing surrounding material together into a glassy tube.
Uses & applications
Used as scientific specimens to study ancient atmospheric conditions and lightning strikes, and collected as unique natural artifacts.
Geological facts
Fulgurites are often referred to as petrified lightning and contain tiny trapped bubbles of ancient air.
Field identification & locations
Found globally in sandy deserts and beaches; identify by their fragile, hollow, glass-lined tubular structures.
