1.High grade single crystal diamond 2.fine ... size synthetic diamond (YWD) Color: Yellow pure Size: 1.0mm, 1.5mm, 2mm, 2.2mm, 2.4mm, 2.6mm, ... and thermal stability, suitable for high grade cutting, drilling, and grinding tools. YWD 2160 complete crystal shape with full ... containing more regular crystal, suitalbe for grinding and free-cutting tools, grinding wheels which work with medium load. synthetic ...