ersbyite

例句：

1. 1. The ersbyite is a rare mineral that has been found in only a few places on Earth.
   这种矿物非常罕见，只在地球上的少数地方被发现过。
2. 2. The ersbyite was discovered during a scientific expedition to the Antarctic.
   这种矿物是在一次前往南极的科学考察中发现的。
3. 3. The ersbyite has been used in jewelry making for centuries.
   这种矿物在珠宝制作中已经被使用了好几个世纪。