... and good shape 3.low impuritity. Item: big size synthetic diamond (YWD) Color: Yellow pure Size: 1.0mm, 1.5mm, 2mm ... grade, the hardness is same with natural diamond, so our 50 and YWD 70 synthetic diamond can be used as jewelleries. Application ... , good diaphaneity and low impurity, high strength, suitable for circular saws, frame-saw and geological broaches. YWD 2140 comparatively regular crystal ...