The difference between granite, marble and granite
Marble is the original rock in the earth's crust formed through the crust in high temperature and high pressure metamorphic process. The internal forces of the crust prompted changes the original quality of various kinds of rocks. A qualitative change refers to the structure, structure and mineral composition of the original rock changes. After the new type of rock formation called qualitative marble is mainly composed of metamorphic rocks. Calcite, limestone, serpentine and dolomite. The main ingredient in calcium carbonate, accounting for more than 50%. There are other magnesium carbonate, calcium oxide, manganese oxide and silicon dioxide. The rocks generally contain impurities, and calcium carbonate by carbon dioxide, carbide, the role of water vapor in the atmosphere, but also easy to weathering and erosion, the surface soon lose luster, relatively soft marble of a general nature, which is relative to the granite character. Of course, you don't need to ignore this, because this The geological age is calculated by 100 million in the US, the rest of life, this qualitative change is a change.
The two can be distinguished from the geological concepts. The granite is igneous rock, also called acid crystallization plutonic rocks, is one of the most widely distributed rock in igneous rock composed of feldspar, quartz and mica, the composition of silica was 65% ~ 75%, hard rock compacting. Lava condensation crystallization of igneous rocks is underground the volcano eruption magma or so-called formed rock. The nature and content of feldspar content of silica in igneous rocks determine the nature of stone. When the silica content of more than 65% belong to acid rock, feldspar, plagioclase crystals and quartz mineral in this kind of rock, granular structure, it said granite.
Stone also called synthetic stone, stone, stone engineering reconstruction. With its natural marble particle, powder as the main raw material, also can be added as embellishment in the mosaic, shell, glass and other materials, with organic resin as binder, with vacuum mixing, high pressure shock made the material, and then after curing at room temperature (curing time in more than 7 days), sawing, grinding, polishing and other processes to sheet.Natural stone in daily use is mainly divided into two types: marble and granite. In general, where there is texture, marble, to spot the main known granite. It is in a broad sense. In a narrow sense, refers to the Yunnan marble stone produced in Dali. In fact, now the country is not a few pieces of stone out of Dali.
