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 Englisch Thesaurus
quartz [kwɔ:ts] Abk.
Abkürz. qtz
Mar., Abkürz. qrtz
schm. A very hard mineral composed of silica, found worldwide in many different types of rocks, including sandstone and granite. Types include amethyst, smokey quartz, tiger's eye quartz, rose quartz, among others. Chalcedony, another type, is a type of polysi