svanbergite

例句：

1. 1. The svanbergite crystals were found in the mountain caves.
   在山中的洞穴里发现了斯万伯格石晶体。
2. 2. Svanbergite is a rare mineral that can be found only in certain parts of the world.
   斯万伯格石是一种稀有矿物，仅在某些世界地区发现。
3. 3. The svanbergite crystals have been used in jewelry making for centuries.
   斯万伯格石晶体被用于珠宝制作几个世纪了。