crystal quartz的用法和樣例：
例句
- Crystal quartz is a very useful material for fabrication of finished optics.
結晶石英是製造成品光學器件非常有用的材料。 - Colored by iron, Amethyst is a variety of macrocrystalline Quartz that occurs in transparent pastel roses to deep purples.
各種各樣的紫水晶都是粗結晶石英，因內含的鐵物質而變成色彩多姿，顏色由透明如水的粉紅色過渡到深紫色。 - Quartz crystal is perfectly crystallized.
石英晶體是完美的結晶。 - Quartz crystals are seldom used in such handsets.
石英晶體是很少使用這種手機。
