For its good properties and characters it has wide application 1. Due to its extreme hardness it has good wear and abrasive resistance then it can be used as not only lapping and polishing material such as the polishing of high speed steel but also cutting tools for hard metal wire drawing dies abrasive tools with high abrasive and wear resistance sealed washer (gasket) and the nozzles for water jet cutters slurry pumping grit blashing etc 2 .As the raw material for refractory industry special welding etc
3. To be used as raw material for ballistic armour and relative products
4. For perfect hardness is widely used for lapping, polishing