Yunnan volcanic rock color stone raw stone

The formation of natural colored stone patterns is due to the formation of tens of millions of years after the lava is squeezed during the change of crustal movement. The longer it is calcified underground, the richer the color of the stone. But at the same time, the longer the calcification time, the worse the hardness of the stone, and sometimes it is even completely broken during the mining process. Therefore, it is extremely difficult to extract complete stone.