The Bharat Diamond Bourse (BDB), labelled as the world's largest diamond trading centre, opened Sunday in India's financial capital Mumbai, more than 20 years after the idea was first mooted. The Bharat Diamond Bourse (BDB) is spread over 20 acres, with eight towers of nine storeys each, housing 2,500 offices in addition to the customs department, banks and other service providers who cater to the gems and jewellery trade. An extra space of 2 million sq ft has also been provided for auditoriums...