The diamond trade covers 8% of Belgium's exports and about 30,000 people are directly or indirectly involved in the Belgian diamond sector. It is all about securityAntwerp Diamond District is the area where 80% of the world's diamond trade takes place. You must never have been convicted of a crime and you must have been active in the diamond trade for several years. Breach of etiquetteAs a diamond dealer, there are a number of unwritten rules that must be observed within the diamond bourses. The fact that he even addressed me in the elevator was a rare break with diamond district etiquette.

Source: Huffington Post July 31, 2016 15:22 UTC