Black Silicon Carbide (C) has a chemical composition of mainly SiC. It is produced at a high temperature in an electric resistance type furnace with quarts sand and petroleum coke as its main raw materials. Its hardness is between Aluminum Oxide and Synthetic Diamond. The mechanical intensity of Black Silicon Carbide is higher than Aluminum Oxide. It is brittle and sharp and has electrical and heat conductivity in some degree. It is suitable for make grinding wheels, cutting wheels, mounted points, oil stones, and also suitable for surface grinding or polishing. The abrasive products made of it are suitable for working on Cast Iron, Non-ferrous Metal, Rock, Rubber, Wood, and ceramics.