danaite

例句：

1. 1. The diamond is the hardest material known to man.
   钻石是已知的人类最硬的材料。
2. 2. She wore a diamond necklace as a symbol of her wealth.
   她戴着一条钻石项链作为财富的象征。
3. 3. Diamonds are often used in jewelry and other decorative items.
   钻石常用于珠宝和其他装饰品中。