How to accurately grasp the high-quality stone

(1) Analysis quality stone color from the color, try to avoid using a more obvious color of the stone, they must also avoid the use of colored stone scar. (2) avoid the use of thermal power stone containing high mineral stone excessive iron sulfide, salt, carbonaceous, clay and other harmful substances can avoid using ingredients from the stone. Sesame white board stock a large number of low-cost treatment to burn as follows: 300 * 600 * 2.5: 37 yuan / square, 300 * 600 * 50: 45 yuan / square. Curb: 800 yuan / cubic meters.