Bluestone is one of the most widely distributed gray or gray sedimentary rocks (about 15% of the lithosphere) in the sea lake basin. It is the most important component of carbonate rocks. Bluestone is the raw material of lime. Besides lime, Bluestone is also used as stone and sand by stone factory. As a component of cement, gravel is a necessity for building houses. The main component of bluestone is calcium carbonate, no pollution and no radiation, so bluestone made out of stone tablets, slabs, stone carvings are also green products.