... 3.low impuritity. Item: big size synthetic diamond (YWD) Color: Yellow pure Size: 1.0mm, 1.5mm, 2mm, 2 ... construction, engineering, mechanical processing etc. YWD 2290 consistent crystal color, regular shape, good trandparancy, high strength and great thermal ... , containing more regular crystal, suitalbe for grinding and free-cutting tools, grinding wheels which work with medium load. synthetic ...