Crystal quartz is a very useful material for fabrication of finished optics. 结晶石英是制造成品光学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. 各种各样的紫水晶都是粗结晶石英，因内含的铁物质而变成色彩多姿，颜色由透明如水的粉红色过渡到深紫色。
Quartz crystal is perfectly crystallized. 石英晶体是完美的结晶。
Quartz crystals are seldom used in such handsets. 石英晶体是很少使用这种手机。
