Images
Formula: SiO2
Questionable mineral species. A natural fused, X-ray amorphous silica. It can form when lightning strikes sand or other
very silica-rich sediments and rocks, creating structures called fulgurites, hollow tubes that are often irregular and
branched. It also forms by the impact of meteorites, melting silica-rich sand. It is the major component of the impact
glass called Libyan Desert Glass
(Mindat).
Oxide, silica group
Crystal system: Amorphous
Environments