First: Observe the surface structure of the stone with the naked eye.
Generally speaking, the uniform fine material structure stone has a fine texture, which is the best product of the stone; the coarse grain and unequal grain structure stone has poor appearance effect, uneven mechanical properties, and slightly worse quality. In addition, due to the influence of geology in natural stone, some fine pulsation and micro-cracks are often produced in it, and the stone is easy to crack along these parts, so care should be taken to remove it. As for the lack of edges and corners, it will affect the appearance, so you should pay special attention when choosing.
Second: measure the size of the stone.
so as not to affect the splicing, or cause the patterns, patterns, and lines to be deformed after splicing, and affect the decorative effect.
Third: listen to the percussion sound of the stone.
Generally speaking, a stone with good quality, dense and uniform inside and no micro-cracks will have a crisp and pleasant knocking sound; on the contrary, if there are micro-cracks or fine veins inside the stone or the contact between particles becomes loose due to weathering, the knock The sound is rough.
Ink is usually dripped on the back of the stone. If the ink is quickly dispersed and leached, it means that the internal particles of the stone are loose or there are microscopic cracks, and the quality of the stone is not good. On the contrary, if the ink drops remain in place, the stone is dense. , Good texture. In the selection of finished slabs, since the raw materials of stone are natural, it is impossible to have the same texture, and the level of craftsmanship in mining and processing is also different.