quartz

石英

The riverbed was full of small pieces of white quartz.

河床上布滿了白色的小石英碎塊。

石英錶、石英鐘口語

He still wears an old quartz his father gave him.

他還戴著父親給他的那只舊石英錶。

石英的、石英製的

A quartz watch keeps better time than a mechanical one.

石英錶走時比機械錶準確。