... 2.15 years export 3.fast delivery 1.Brief introduction Black Silicon Carbide is produced in an electric resistance furnace from quartz sand ... for lapping,polishing and blasting. 2.Chemical & Physical Properties Color:Black Moh's hardness:9.5 True Density:3.9 g ... : 25kg PVC bags+1MT big bag Standard: FEPA,JIS,GB,P 3.Applications - Bonded abrasives and Coated abrasives - lapping, polishing, decorative ...