Antwerp's diamond district, also known as the Diamond Quarter is an area within the city o fAntwerp. It consists of several square blocks covering an area of about one square mile. While, as of 2012, much of the gem cutting and polishing work historically done in the neighborhood had moved to low wage centers elsewhere, about 84% of the world's rough diamonds passed through the district, making it the largest diamond district in the world with a turnover of 54 billion dollars. There are 380 workshops that serve 1,500 companies. There are also 3,500 brokers, merchants & diamond cutters. Within the area is the Antwerp World Diamond Centre, and four trading exchanges. There are also four banks specializing in the financing of the diamond trade.