DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   quartz
       n 1: colorless glass made of almost pure silica [syn: quartz
    glass, quartz, vitreous silica, lechatelierite,
            crystal]
       2: a hard glossy mineral consisting of silicon dioxide in
          crystal form; present in most rocks (especially sandstone and
          granite); yellow sand is quartz with iron oxide impurities