alum schist

例句：

1. 1.The mineral deposits in this area are rich in alum schist.
   这个地区的矿物矿床富含铝石片岩。
2. 2.Alum schist is used as an industrial material for making glass and ceramics.
   铝石片岩被用作制造玻璃和陶瓷的工业原料。
3. 3. The alum schist was mined from the mountains, providing raw materials for the local industry.
   从山区开采的铝石片岩为当地工业提供了原材料。