The natural stone that sells on market now, partial colour and lustre is to pass artificial processing, these stone are used commonly half to a year or so can reveal its real face.Cut corners, the thickness of these stones have been thinned, the strength is not enough, so the added grid, general color darker stones if there is grid, most of it is this factor.Artificial stone is a kind of artificial stone, which is made of unsaturated polyester resin as the binder, together with natural marble or calcite, dolomite, silica sand, glass powder and other inorganic powder, as well as some flame retardant and color, etc., through mixing, casting, vibration compression, extrusion and other methods.
Natural stone in daily use is mainly divided into two kinds: marble and granite.Generally speaking, general has grain, call marble, with dot spot give priority to call granite.This is in a broad sense.In a narrow sense, marble refers to the stone from Dali in yunnan province.In fact, few of the stones in any part of the country are from Dali.
The two can also be distinguished by geological concepts.Granite is igneous rock, also known as acid crystalline pluton, is the most widely distributed rock in igneous rock, composed of feldspar, quartz and mica, its composition is mainly silica, about 65% ~ 75%, the rock is hard and dense.The so-called igneous rocks are rocks formed by the condensation and crystallization of underground magma or lava spewing from volcanoes.The content of silica in igneous rocks, the properties of feldspar and its contents determine the properties of the stones.When the content of silica is more than 65 percent, it belongs to acidic rock. In this kind of rock, the basic minerals such as orthoclase, plagioclase and quartz form crystals and show granular structure, which is called granite.
Marble is the metamorphic rock of the original rock in the crust formed by the action of high temperature and pressure in the crust.The process by which the internal forces of the earth's crust cause a qualitative change in the original types of rock.Qualitative change refers to the change of the original rock structure, structure and mineral composition.A 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.Because marble is contained impurity commonly, and the action of carbon dioxide, carbide, moisture gas in the atmosphere, also easy weathering and dissolve, and make the surface quickly loses burnish, marble general character is softer, this is opposite to granite character.Of course, you don't have to pay any attention to this, because this geological age is calculated on the basis of a billion, and this qualitative change is a finite change in our lifetime.
Of course, the above mentioned marble and granite in the above classification, are a narrower definition.What say on market now, what have grain commonly is metamorphic rock, also call marble so.And the spot spot crystalline particles, also known as granite.In fact, too detailed a classification, that is the work of a geologist, for interior decoration, almost.Of course, if your stone is used outdoors, due to the harsh environment, it needs to be classified in more detail.
Because natural stone material surface has fine aperture, so in the respect of stain resistance is weaker.Generally in processing plant will be in its surface processing.In indoor decorating, TV mesa, windowsill mesa, indoor ground suits to use marble.And threshold, hutch ark mesa, outdoor ground suits to use granite.Among them hutch ark mesa had better be to use brunet granite.
The natural stone that sells on market now, partial colour and lustre is to pass artificial processing, these stone are used commonly half to a year or so can reveal its real face.The most obvious is the big flower green on the market now, a lot of is to dye and become, not be true big flower green.
In addition, we should pay attention to the back grid. There are two kinds of this situation: 1. The stone itself is fragile, and the grid must be added, such as Spanish rice yellow.2. Cut corners. The thickness of these stones has been thinned and the strength is not enough.