lechatelierite

from WordNet (r) 3.0 (2006)

lechatelierite
    n 1: colorless glass made of almost pure silica [syn: {quartz
         glass}, {quartz}, {vitreous silica}, {lechatelierite},
         {crystal}]

from The Collaborative International Dictionary of English v.0.48

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

   Syn: quartz glass, vitreous silica, crystal.
        [WordNet 1.5 +PJC]