coarse crystal

例句：

1. 1. The coarse crystals are used in the production of glass.
   粗晶石用于生产玻璃。
2. 2. The crude minerals were extracted from the earth's crust.
   这些矿物质是从地球的地壳中提取出来的。
3. 3. Coarse crystals can be found in many different rocks and minerals.
   粗晶石可以在许多不同的岩石和矿物中找到。