Borazon

Borazon is a material formed by compressing and heating boron (element 9) nitride (element 7) under conditions that create diamond. It is almost as hard as diamond but more stable at high temperatures.
 Robert H. Wentorf, Jr United States 1957 Borazon

Borazon is a material formed by compressing and heating boron (element 9) nitride (element 7) under conditions that create diamond. It is almost as hard as diamond but more stable at high temperatures.