What's the difference between Henan bluestone and Shandong bluestone?

1, different varieties: Shandong is rich in Yimeng bluestone. This kind of stone is similar to the traditional Taihu stone and belongs to limestone. The main component is calcium carbonate, which is dissolved limestone. Yimeng bluestone was originally a carbonate sedimentary rock, mainly limestone.

2. Henan is rich in Qihe hollow bluestone. It is a treasure of medical treatment and collection. Kongqingshi is a kind of medicinal material. It is said that the water in the stone can cure eye diseases and has the magical effect of removing black and restoring sight, so that the blind can see the light again.