Granite is an intrusive rock in acidic (SiO2>66%) magmatic rock, which is the most common rock in this category. It is mostly light red flesh, light gray, gray, etc.Medium coarse grain, fine grain structure, block structure.There are also some patchy structures, spherical structures, gneiss-like structures and so on.The main minerals are quartz, potassium feldspar and acid plagioclase, the secondary minerals are biotite, amphibole, and sometimes a small amount of pyroxene.There are many kinds of accessory minerals, such as magnetite, sphen, zircon, apatite, tourmaline, fluorite, etc.Quartz is the most abundant of all magmatic rocks, ranging from 20 to 50 percent and a few from 50 to 60 percent.The content of potassium feldspar is generally more than plagioclase, the proportion relationship between the content of the two is often potassium feldspar accounts for two thirds of the total feldspar, plagioclase accounts for one third, potassium feldspar in granite is more light flesh red, also have gray, gray.Pale potassium feldspar and plagioclase are often indistinguishable from each other in hand specimens.At this time, we should carefully observe the double crystal characteristics of these two kinds of feldspar, because plagioclase with poly double crystal, turn to hand specimens can be seen on the plagioclase crystal with regular light and dark poly piece, and potassium feldspar for card double crystal, the performance of different brightness of the two hemicrystals.
Granite can also be further named according to dark mineral species, such as dark mineral is mainly biotite, can be called biotite granite, which is a common type of granite.For example, biotite and Muscovite, with nearly equal content, can be called two-mica granite; if the dark mineral is mainly amphibole, it is called amphibole granite; if the dark mineral is mainly pyroxene, it is called pyroxene granite; if the dark mineral is almost no dark mineral, it is called granite.
Introduction of granite price products：
The price of granite products is shown in some pictures：