transparent quartz

English Thesaurus

1. a clear quartz used in making electronic and optical equipment (noun.substance)

hypernym	:	quartz,
definition	:	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 (noun.substance)

hyponym	:	rhinestone,
definition	:	an imitation diamond made from rock crystal or glass or paste (noun.substance)