sphenolith

例句：

1. 1. The sphenolith is a type of rock that is formed by the metamorphism of ancient rocks.
   花岗岩是一种由古代岩石的变质形成的岩石类型。
2. 2.The granite is a hard and durable material that is often used in construction.
   花岗岩是一种坚硬耐用的材料，常用于建筑中。
3. 3.Quartzite is another type of rock that is similar to granite but has a different mineral composition.
   石英岩是另一种与花岗岩相似的岩石，但矿物成分不同。