How to distinguish natural stone
Natural stone in the daily use is mainly divided into two kinds: marble and granite. In general, all textured, called marble, to spot the main known as granite. This is in a broad sense. From the narrow sense, the marble refers to the marble produced in Yunnan Dali. In fact, now a few stones around the country is Dali out.
Now the market sales of natural stone, part of the color is processed by the people, these stones generally use half a year or so will reveal its true face. Cut corners, the thickness of these stone is thin, and strength is not enough, so add a grid, the general color of the deep stone if there is a grid, most of this factor. Artificial stone is unsaturated polyester resin as binder, with natural marble or calcite, dolomite, silica sand, glass powder and other inorganic powder, and the amount of flame retardants, color, etc., by mixing ingredients, casting, Vibration compression, extrusion and other methods of forming a solidification made of artificial stone.
Marble is the crust in the original rock through the crust in the formation of high temperature and high pressure metamorphic rocks. The internal forces of the crust promote the process of changes in the quality of the original rocks. The change of mass refers to the change of the structure, structure and mineral composition of the original rock. The new rock types formed by qualitative change are called metamorphic rocks. Marble is mainly composed of calcite, limestone, serpentine and dolomite. The main component of calcium carbonate-based, accounting for more than 50%. There are other magnesium carbonate, calcium oxide, manganese oxide and silica. As the marble generally contain impurities, and calcium carbonate in the atmosphere by carbon dioxide, carbide, water vapor role, but also easy to weathering and erosion, leaving the surface soon lost luster, the general nature of the marble is relatively soft, which is relative to the granite Stone in terms of. Of course, you do not have to ignore this, because the geological age is calculated in terms of billion, in our lifetime, this qualitative change is a limited change.
The two can also be distinguished from the geological concept. Granite is igneous rock, also known as acid crystal deep diagenesis, is the most widely distributed igneous rock, composed of feldspar, quartz and mica, its composition is mainly silica, about 65% to 75% Hard and dense. The so-called igneous rock is the underground magma or volcanic spilled lava condensed crystallization of the rock. The content of silica in the igneous rocks, the nature of the feldspar and its content determines the nature of the stone. When the content of silica is greater than 65%, it belongs to the acid rock, this rock is feldspar, plagioclase, quartz and other basic minerals to form crystals, was granular structure, known as granite.
