What is sic called?

Silicon carbide (sic), also known as diamond sand, carbon silica, in nature in the form of moissanite this rare mineral forms exist. It is with quartz sand, petroleum coke (or char), sawdust (production of green silicon carbide need to add salt) and other raw materials through the resistance furnace high temperature smelting, for the silicon and carbon phase bond formed by the ceramic-like compound. At present, China's industrial production of silicon carbide is divided into black and green silicon carbide two, are six square crystals, the specific gravity of 3.20~3.25, micro-hardness of 2840~3320kg/mm2.