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Jwaneng is the richest diamond mine in the world by value

Another major diamond mine is Botswana is the Jwaneng site , which is located 160 miles south-west of Gaborone in south central Botswana . The mine , which has been in production since 1982 , is another partnership owned and operated site by the De Beers Company and the Government of Botswana . Regarded as the “ richest ” diamond mine in the world in terms of value , the Jwaneng mine is estimated to contain roughly 88 million carats of diamond reserves . Since 2010 , the mine has undergone a major expansion ( Cut-8 ) to extend the mine ’ s life cycle until 2025 .

40 September 2014