mineral
Fulgurite
Lechatelierite
AI-generated identification · may be incorrectHardness of 5.5 to 6 on the Mohs scale, typically brown, tan, or grey in color, with a glassy to vitreous luster and amorphous crystal structure.
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 5.5 to 6 on the Mohs scale, typically brown, tan, or grey in color, with a glassy to vitreous luster and amorphous crystal structure.
Formation & geological history
Formed when a high-voltage lightning strike instantaneously melts and vitrifies silica-rich sand or soil, typically dating from the Quaternary period.
Uses & applications
Valued as unique natural artifacts for scientific research, educational displays, and mineral collecting.
Geological facts
Often referred to as petrified lightning, these fragile tubular structures capture the exact path of electrical discharge through the ground.
Field identification & locations
Identify by its hollow, glassy interior lining and fragile sandy exterior, commonly found in desert sand dunes and coastal beaches worldwide.
