duralium

例句：

1. 1.The gemstone is a rare and valuable mineral.
   这块宝石是稀有且有价值的矿物。
2. 2.The diamond in the necklace was cut by a master jeweler.
   项链上的钻石是由一位大师切割的。
3. 3. Zircons are found in many rocks and minerals.
   锆石存在于许多岩石和矿物中。