Wikipedia
Debswana
Debswana Diamond Company Ltd, or simply Debswana, is a mining company located in Botswana, and is the world's leading producer of diamonds by value. Debswana is a joint venture between the government of Botswana and the South African diamond company De Beers; each party owns 50% of the company. Debswana operates four diamond mines in central Botswana, as well as a coal mine.