Jwaneng is a town located in the Southern District of Botswana, but it is not part of this, being a separate district, with its own Town Council. …Jwaneng is a town located in the Southern District of Botswana, but it is not part of this, being a separate district, with its own Town Council. The town was formed around the Jwaneng diamond mine, considered the richest in the world in terms of its content of gem-quality diamonds. At its inception it was a 'closed town', meaning that in order to live there permission was needed from the owners of the mine, Debswana.