One view: the surface structure of the stone is observed by the naked eye. Generally speaking, the uniform fine material structure of the stone has a delicate texture, which is a good stone material; the coarse grain and the unequal grain structure stone have poor appearance effect, the mechanical properties are not uniform, and the quality is slightly poor. In addition, natural stone often produces some fine veins and micro-cracks due to the influence of geological effects. Stones are most likely to rupture along these parts, and should be removed. As for the lack of edges and angles, it is more important to affect the appearance, especially when choosing.
Two quantity: the size specification of the stone, so as not to affect the splicing, or cause the pattern, pattern and line deformation after splicing, affecting the decorative effect.
Three listening: Listen to the sound of the stone. In general, the quality of the stone with good internal density and no micro-cracks is crisp and pleasant; on the contrary, if there are micro-cracks or fine veins inside the stone or the contact between the particles becomes loose due to weathering, knock The sound is hoarse.
Four tests: use simple test methods to check the quality of stone. Usually a small drop of ink is dripped on the back side of the stone. If the ink is quickly dispersed and leached everywhere, it means that the inner particles of the stone are loose or there are micro-cracks, and the quality of the stone is not good. Conversely, if the ink drops do not move in the original place, it means The stone is dense and has a good texture.