calcite dolomite

例句：

1. 1. Calcite is a type of mineral that occursnaturally in many rocks.
   方解石是一种自然存在于许多岩石中的矿物。
2. 2. The crystals of calcite are often used injewelry making.
   方解石的晶体常用于珠宝制作。
3. 3. The formation of calcitecan be traced back to the earlyEarth's crust.
   方解石的形成可以追溯到早期地球地壳的形成。
4. 1. Dolomite is a sedimentaryrock composed mainly of calcium carbonate.
   白云石是一种主要由碳酸钙组成的沉积岩。
5. 2.Dolomite is commonly found in limestone deposits.
   白云石通常存在于石灰石矿床中。
6. 3. Dolomite isan important building material for concrete production.
   白云石是混凝土生产的重要建筑材料。