... . It's also the main material for diamond polishing tools,used for abrasive gem,resin grinding wheel,polishing diamond micro powder is the hardest ... /400170/200 400/500200/230 500/6003.Diamond micro powder:For polishing: 0-0.5,0-1,0.5-1,0.5 ... -22, 20-30,22-36, 36-541.Diamond for grinding, lapping,2.polishing and fine finishing applications.3.It is a highly ...