What is the difference between marble and granite?
Now the market said, the general texture are metamorphic rocks, it is also known as marble. And was spotted crystal grain particles, also known as granite. In fact, too detailed classification, it is geologist things, for interior decoration, almost on the line. Of course, if your stone for outdoor, because the environment is more harsh, you need to conduct a more detailed classification.
Because the natural stone surface has fine pores, so the weakness is relatively weak. Usually in the processing plant will be in its surface for processing. In the interior decoration, the TV countertops, windowsill table, indoor floor, etc. suitable for use of marble. The threshold, kitchen countertops, outdoor ground is suitable for the use of granite. Which kitchen countertop is best to use dark granite.
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. The most obvious is now on the market big flowers green, many are stained, not really big green flowers.
Also note that the back of the grid, there are two kinds of this situation: 1. Stone itself is more brittle, must be added grid, such as the Spanish beige. 2. 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.
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.
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.
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.
