One of the two principal wholesale diamonds trade routes passed through Venice. It enjoyed a monopoly of the GIA Certified Diamond trade on its way to the main towns of southern Germany up to its final destination in Bruges.
In order to cut diamond fashion at the best angles to produce the most fire, much of the original GIA Certified Diamond rough is lost, resulting in a great decrease in the diamonds carat weight.
The diamond fashion Exchange have the worlds largest GIA Certified Diamond trading hall, which is equipped to accommodate more than 1,000 people at a time.