... with smooth crystal face,high compression strength synthetic diamond 1.Usage:lapping, grinding and polishing ... , magnet heads, gems 2.Better shape&purity synthetic diamondCharacteristics: shape and purity after multiple treating measures ... objects, magnet heads, gems and electroplated articles. Diamond micron powder :Grit:0-0.5, 0-1 ... 30-40, 40-60 ,50-70 ,60-80 Synthetic diamond RVD: 30/35,35/40,40/45,45/ ...