Bharat Diamond Bourse (BDB) is the world's largest diamond bourse (exchange) and is located in Mumbai, India. Spread over a 20-acre plot, the Complex is home to some 2,500 small and large diamond traders in addition to the Custom House, banks and other service providers who cater to the gems and jewelry trade.
There are 26 towers having 9 floors each. The total constructed area is 2,000,000 sq ft (190,000 m2), with two basements of additional 1,000,000 sq ft (93,000 m2).
The facilities at BDB comprise offices of diamond traders, four walk-in vaults, 24,500 safe deposit boxes, a 6,200-square-foot (580 m2) trading floor, strong rooms, lockers and customs clearance facilities with all the modern facilities required to carry on day-to-day business.
It is located in the G Block of the Bandra Kurla Complex, between the Mumbai suburbs of Bandra and Kurla. It has an inflow of some 45,000 – 50,000 people daily. BDB handles 98% of diamond exports from India.
According to en.wikipedia