cohenite

例句：

1. 1. The diamond cutter uses a piece of cohenite to polish the gemstones.
   钻石切割机使用一块钴石来抛光宝石。
2. 2. Cohenite is a rare and valuable mineral that can be found in small quantities in some rocks.
   钴石是一种稀有且有价值的矿物，可以在一些岩石中以少量存在。
3. 3.The cohenite mine was discovered by a team of geologists during their research expedition.
   地质学家团队在研究探险中发现了钴矿。