kerchenite

例句：

1. 1. The kerchenite is a mineral that is found in the earth's crust.
   该矿物存在于地球的地壳中。
2. 2. The kerchenite has been used as an ornamental material for centuries.
   该矿物被用作装饰材料数百年。
3. 3. The kerchenite is a valuable resource for mining and industrial applications.
   该矿物是采矿和工业应用的重要资源。