方解石

例句：

1. 1. The mineral deposit is composed mainly of calcite.
   这个矿床主要由方解石组成。
2. 2. The crystals are transparent and have a white color, which is typical of calcite.
   这些晶体透明，呈白色，这是方解石的典型特征。
3. 3. Calcite is often used as a building material due to its hardness and durability.
   由于其硬度和耐用性，方解石常被用作建筑材料。