johnstonite

例句：

1. 1. The mineral is named after the town where it was found, Johnsonville.
   这种矿物以发现它的小镇命名，约翰逊维尔。
2. 2. The Johnsonville mine is a major source of copper and silver.
   约翰逊维尔矿是铜和银的主要来源。
3. 3.Due to its unique properties, Johnsonville stone has been used in various applications.
   由于其独特的性质，约翰逊维尔石被用于各种应用。