alvardite

例句：

1. 1. The alvardite is a rare and valuable mineral.
   这种矿物是稀有且有价值的。
2. 2. The alvardite was discovered in the remote region of Antarctica.
   这种矿物是在南极洲偏远地区发现的。
3. 3. The alvardite has been used in ancient civilizations for its healing properties.
   这种矿物在古代文明中被用于其治疗属性。