For processed refined finishes granite countertops, its quality can be identified from the following four aspects: a concept that visually observe the surface structure of stone in general, uniform fine material stone structure has a delicate texture. to share the stone, stone coarse grain structure and varying its appearance is poor. In addition, the stone often due to geological processes which have some minor cracks in the rupture stone most likely to occur along these areas, attention should be removed. As lack of impact is more angular appearance, particular attention should be selected. Second volume, namely the amount of stone sizes, so as not to affect splicing, or cause after stitching pattern, patterns, lines deformation, affecting the decorative effect. three, namely listening stone percussion sounds. Its good quality stone percussion crisp, sweet, on the contrary, if the stone house there is a slight crack or indirectly due to weathering cause thixotropic loose particles, the percussion sound gruff, four test, which uses a simple test methods to test The quality of the stone, usually in the back of the stone on a particle of ink droplets, such as ink quickly disperse leaching, which indicate the presence of the stone inside the particles loose or gaps, poor quality stone, on the contrary, if the ink droplets are fixed in place, then the stone texture is good.