The natural stone that is currently on the market, some of which are hand-treated, will generally reveal their true faces in half a year or so. Cut corners, the thickness of these stones is thinned, the strength is not enough, so the grid is added, the general color of the deeper stone if there is a grid, most of this factor. Artificial stone is made of unsaturated polyester resin as binder, combined with inorganic marble or calcite, dolomite, silica sand, glass powder and other inorganic powders, as well as appropriate amount of flame retardant, color, etc., mixed and cast by ingredients, An artificial stone made by vibration compression, extrusion and other methods. Natural stone is mainly divided into two types in daily use: marble and granite. Generally speaking, any texture, called marble, is mainly called granite. This is in a broad sense. In a narrow sense, marble refers to the stone produced in Dali, Yunnan. In fact, there are not a few stones in the whole country that are out of Dali. The two can also be distinguished from geological concepts. Granite is an igneous rock, also called acid crystalline plutonic rock. It is the most widely distributed rock in igneous rock. It consists of feldspar, quartz and mica. Its composition is mainly silica, accounting for 65%-75%. Hard and dense. The so-called igneous rock is a rock formed by condensing and crystallizing underground magma or volcanic lava. The content of silica in igneous rocks, the nature of feldspar and its content determine the properties of stone. When the content of silica is more than 65%, it belongs to acidic rock. In this rock, when basic minerals such as feldspar, plagioclase and quartz form crystals, it has a granular structure and is called granite. Marble is a metamorphic rock formed by the high temperature and high pressure of the original rock in the earth's crust. The internal force of the crust promotes the process of qualitative changes in the various types of rocks. The qualitative change refers to the change of the structure, structure and mineral composition of the original rock. The new type of rock formed by qualitative change is called metamorphic rock. Marble is mainly composed of calcite, limestone, serpentine and dolomite. Its main component is calcium carbonate, accounting for more than 50%. Others include magnesium carbonate, calcium oxide, manganese oxide, and silicon dioxide. Since marble generally contains impurities, and calcium carbonate is easily corroded and dissolved in the atmosphere by carbon dioxide, carbides and water vapor, the surface is quickly tarnished, and the general nature of marble is relatively soft, which is relative to granite. Stone. Of course, you don't have to pay attention to this, because this geological time is calculated in billions. In our lifetime, this qualitative change is a limited change. Of course, the marble and granite mentioned above are in a narrower definition in the above classification. What is said on the market now, the texture is generally metamorphic, so it is also known as marble. The spotted crystal particles are also known as granite. In fact, too detailed classification, that is the matter of geologists, for the interior decoration, almost on the line. Of course, if your stone is used outdoors, due to the harsh environment, you need to make a more detailed classification. Because the surface of natural stone has pores, it is weak in terms of stain resistance. It is usually processed on the surface of the processing plant. In interior decoration, marble countertops, window sill countertops, indoor floors, etc. are suitable for use in marble. Granite is suitable for the threshold, kitchen countertops and outdoor ground. It is best to use dark granite in the kitchen countertop. The natural stone that is currently on the market, some of which are hand-treated, will generally reveal their true faces in half a year or so. The most obvious is that the big green flowers on the market today are mostly dyed, not really big green. Another thing to note is the back mesh. There are two kinds of situations: 1. The stone itself is brittle and must be gridded, such as Spanish beige. 2. Cut corners, the thickness of these stones is thinned, the strength is not enough, so the grid is added. If the stone with a deeper color is meshed, most of them are this factor. Walk Through Metal Detector,Hotel Security Equipment,Belt Metal Detector,X-Ray Detector Shenzhen MCD Electronics Co., Ltd. , https://www.gdmcd.com