krantzite

例句：

1. 1.The krantzite crystals were found in the cave.
   在洞穴里发现了这种晶体。
2. 2.The krantzite was used as a decorative item in ancient times.
   古代，这种晶体被用作装饰品。
3. 3. The krantzite has been studied for its potential applications in medicine.
   这种晶体已被研究用于其潜在的医学应用。