nepheline phonolite

例句：

1. 1. The mineral is used in the production of glass and ceramics.
   这种矿物用于生产玻璃和陶瓷。
2. 2. It is a rare mineral that occurs naturally in small amounts.
   这是一种稀有的矿物，自然含量很少。
3. 3. The nepheline phonolite was discovered in the 19th century, and its properties have been studied extensively.
   该矿物于19世纪被发现，其性质已被广泛研究。