crystal corundum

例句：

1. 1. The mineral is used in the manufacture of glass and ceramics.
   这种矿物用于制造玻璃和陶瓷。
2. 2.The gemstone has a beautiful color and is highly valued for its durability.
   这种宝石色彩斑斓，因其耐用性而备受珍视。
3. 3. The crystal corundum is often used as a cutting tool in jewelry making.
   水晶刚玉常被用作珠宝制作中的切割工具。