quartz bar

例句：

1. 1. This quartz bar is perfect for cutting and polishing glass.
   这条石英棒非常适合切割和抛光玻璃。
2. 2.The quartz bar has a smooth surface that makes it easy to handle.
   这条石英棒表面光滑，易于操作。
3. 3.Quartz bars are commonly used in jewelry making due to their high hardness.
   由于其高硬度，石英棒常用于珠宝制作。