carbon diamond

例句：

1. 1. Carbon diamonds are a new type of material that can be used for cutting tools.
   碳钻石是一种新型材料，可用于切割工具。
2. 2. The carbon diamond is a rare and valuable gemstone.
   碳钻石是一种稀有且珍贵的宝石。
3. 3. Carbon diamonds have been used in jewelry for centuries.
   碳钻石在珠宝领域已经使用了数百年。