mineral
Fulgurite
Lechatelierite (Silicon dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale, grayish-white to brown color, glassy or vitreous luster, amorphous crystal structure with hollow tubular form, specific gravity around 2.2.
Identified More mineral →
Explore Fulgurite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6-7 on Mohs scale, grayish-white to brown color, glassy or vitreous luster, amorphous crystal structure with hollow tubular form, 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 1,800 degrees Celsius.
Uses & applications
Used primarily as collectible mineral specimens, in scientific studies of ancient climate and lightning strikes, and occasionally in educational displays.
Geological facts
Fulgurites are often called petrified lightning and capture the exact moment of an electrical discharge entering the ground.
Field identification & locations
Found in sandy deserts, beaches, or coastal dunes where lightning frequently strikes; fragile nature requires careful excavation.
