Marble is a high-end building stone. Different qualities of marble are used in different scenarios. Based on the quality of marble, it is divided into Class A, Class B, and Class C. Class A: high-quality marble, with the same and excellent processing quality, no blackboard, dark lines, impurities and pores on the surface of the stone, and the price is relatively expensive. Class B: There are dark spots, stone lines, color difference, fresh and natural smooth lines, relatively high hardness.
Similar as; Class C; black spots and stone lines may be clearer or more points, but this kind of stone is essentially a big problem, and it will be guaranteed to be free of cracks and damages when it is delivered from the factory, and will not affect the overall quality of use. It's just that there are flaws on the surface, and it doesn't look very comfortable. Nevertheless, this kind of stone has a wide range of applications, such as the parks and sidewalks we often go to.