Natural and artificial synthetic single crystal diamond is generally classified according to product application areas, they can be used as cutting tools, grinding machine and wire drawing dies. They are designed to be used for surface finish, geometry and dimensions of precision machining applications have higher requirements. The surface of single-crystal diamond cutting tool was continuous, and the surface of polycrystalline diamond cutting tool showing a micrometer discontinuous state, the situation is more or less the workpiece surface and the grain size of the diamond tool materials related, although Precision characteristics of the workpiece and the cutting tools need to be seriously considered, but there is a general principle that requires the metal surface finish better than 0.025μm circumstances required of single crystal diamond tools and machining tools have high rigidity and high-quality stent .

Natural diamond has already been demonstrated successfully used in these areas. However, the current technology enables the development of high temperature and pressure to prepare a synthetic single crystal diamond having a size as possible, up to the largest size 8mm. Typical examples were prepared using high-pressure diamond is de beers monodite series.