Granite, the main component of continental crust, is an igneous rock formed by magma condensation below the surface, belonging to deep intrusive rock. The main components are feldspar, mica and Shi Ying. The etymology of granite is Latin granum, which means grain or granule. Because granite is a plutonic rock, it can often form well-developed mineral particles that can be distinguished by the naked eye, hence its name. Granite is not easy to weather, beautiful in color, and its appearance can be maintained for more than 1 years. Because of its high hardness and wear resistance, it is not only used as a high-grade building decoration project and hall floor, but also the first choice for open-air carving.

according to the average proportion of different chemical components in 2485 granite samples from all over the world, the weight percentage is from heavy to light:

SiO2-? 72.4%

Al2O3—? 14.42%

K2O—? 4.12%

Na2O—? 3.69%

CaO—? 1.82%

FeO—? 1.68%

Fe2O3—? 1.22%

MgO—? .71%

TiO2—? .3%

P2O5—? .12%

MnO—? .5%