... 1.Usage:lapping, grinding and polishing of optical objects, magnet heads, gems 2.Better shape&purity synthetic diamondCharacteristics: shape and purity after ... . Appliction field: Conventional lapping, grinding and polishing of optical objects, magnet heads, gems and electroplated articles. Diamond micron powder :Grit:0 ... -0.5, 0-1, 0.5-1.5 ,0-2, 1-2, 1-3 ,3-6 ,4-8 ,5-10 ,6 ...