The world's third largest diamond - a 1,098-carat, three-inch gem - has been found in Botswana by local firm Debswana. The stone, found on June 1, was presented to President Mokgweetsi Masisi in the capital Gaborone on Wednesday by Debswana Diamond Company's acting managing director Lynette Armstrong. The gem, found in Jwaneng, the world's richest mine, will be valued in the next few weeks. 'It is believed to be the ...