Quartz is a mineral in the form of a hard, shiny crystal. It is used in making electronic equipment and very accurate watches and clocks.
例句
...a quartz crystal.石英晶體
英漢詞典釋義
n.
〈礦〉石英
There is a great deal quartz in those mountains.那些山里蘊藏著大量石英。
英英詞典釋義
Noun
1. colorless glass made of almost pure silica
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