leptite

例句：

1. 1. The construction crew used lightweight stones to build the new bridge.
   施工队使用轻质石头建造了新桥。
2. 2.The limestone formations are a popular tourist attraction.
   石灰岩形成物是一处受欢迎的旅游景点。
3. 3.Quartzite is a type of rock that is often used in building materials.
   石英岩是一种常用于建筑材料的岩石类型。