guanite

例句：

1. 1. This mineral is often used in jewelry making.
   这种矿物常用于制作珠宝。
2. 2. Quartz is a type of silica, which is found naturally in many rocks.
   石英是一种硅酸盐，自然存在于许多岩石中。
3. 3. The crystals are transparent and can be polished to a high shine.
   这些晶体透明，可以打磨得非常光亮。