lechatelierite

[Jserjryevogy]

colorless glass made of almost pure silica

[Dave Paprocki]

A naturally occurring colorless glass made of almost pure silica, and found in fulgurites, which are produced by lightning striking sand.

[Michiko]

Lechatelierite is a type of naturally occurring, amorphous silica glass formed by a high-energy event such as a lightning strike or meteor impact. Its named after French chemist Henry Le Chatelier. It is a rare mineral because of the specific conditions needed for its formation.