diamantane

例句：

1. 1. The diamond is the most valuable gemstone in the world.
   钻石是世界上最珍贵的宝石。
2. 2. Diamonds are used in jewelry and cutting tools.
   钻石用于珠宝和切割工具。
3. 3. The diamond mine was discovered in Africa.
   钻石矿在非洲被发现。