Granite

Granite is a coarse grained crystalline igneous rock composed primarily of quartz and feldspar. It forms from slowly cooling magma (silicate melt) that is subjected to extreme pressures deep beneath the earth's surface.

Quartz is silicon dioxide, mica and feldspar are complex silicate.

Granite is a deep-acid igneous. Commonly known as Granite. The silica content of more than 70%, the color is light, gray and white, red meat are more common. Mainly contains quartz, feldspar, biotite and a small dark mineral composition. Quartz content of 20% to 40%, Alkaline are more plagioclase feldspar stone, about feldspar total above 2 / 3. Alkali feldspar for various K-feldspar and albite, Ramps mainly sodium feldspar - or longer-longer. Dark black mica minerals mainly with a small amount of amphibole . It is granite structure or structure like Plaque.

The mineral content types can be divided into biotite granite, muscovite granite, hornblende granite, biotite granite and Two - mica granite; According tectonic structure, can be divided into fine-grained granite, granite tablets, coarse-grained granite, porphyritic granite, it seems porphyritic granite, crystal hole granite and gneissic granite, etc. According to Deputy contained minerals can be divided into cassiterite with granite, granite containing niobium iron, beryllium-containing granite, lithium - mica granite, and granite tourmaline, ect. Long common petrochemical, clouds of British rock, electrical, petrochemical, and other self metamorphism .

Granite is a broad distribution of the rock, geologic era has various outputs. Patterns mostly rock foundation, the rock strains, such as bell rock. The cause, it was suggested that the crust is deep in the granite magma crystallization by condensation or by basaltic magma crystallization differentiation form, it was also considered to be accountable and depth metamorphism caused by the effect of the result of granite. Many non-ferrous minerals such as copper, lead, zinc, tungsten, tin, bismuth, molybdenum, etc., Precious metals like gold, silver, rare metals such as niobium, tantalum, beryllium . Radioactive elements such as uranium and thorium , with the granite. Granite structure is uniform, hard, beautiful colors, the quality is construction stone.

Granite has a uniform structure, and its texture is hard. Compressive strength and the origin of the stone vary around 1000-3000 kg / cm. Weathered granite difficult, beautiful color, exterior color can maintain more than 100 years, because of its high hardness and wear resistance,