zanthine

例句：

1. 1.The gemstone is a rare and valuable material.
   这种宝石是稀有且有价值的材料。
2. 2.The zanthine crystals are highly polished and have a beautiful shine.
   这种锆石晶体非常光滑，闪耀着美丽的光泽。
3. 3.Zanthines are often used in jewelry making due to their durability and beauty.
   由于其耐用性和美丽，锆石常用于珠宝制作。