1) Boron compound 2) Synthetic material
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https://www.crosswordclues.com/clue/borazon
Borazon is a brand name of a cubic form of boron nitride (CBN). Its color ranges from black to brown and gold, depending on the chemical bond. It is one of the hardest known materials, along with various forms of diamond and boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1...
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http://en.wikipedia.org/wiki/Borazon
(from the article `boron`) ...different) forms. One of them has a layer structure resembling that of graphite, while the other has a cubic crystalline structure similar to that ...
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http://www.britannica.com/eb/a-z/b/94
a brand name for a cubic, diamondlike, extremely hard form of boron nitride, obtained at high temperatures and pressures: used as an abrasive and grinding agent.
Found on
https://www.infoplease.com/dictionary/borazon
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