Black silicon carbide stone polishing 1.High purity,SIC:98%min 2.FEPA,JIS,GB ... series 3.More than 90% exported Black silicon carbide stone polishing1.High purity,SIC:98%min 2.FEPA,JIS,GB ... carbide is the main raw materials of quartz sand , stone sand and petroleum coke. 2.It is made in the ... 100#120#150#180#220#320#800Black silicon carbide for stone polishing Black silicon carbide stone polishing