July 1 (Reuters) – Botswana and De Beers Group have agreed a new diamond sales deal in which the African country, the world’s No. 1 diamond producer by value, gradually increases the share of rough stones it gets from their joint venture Debswana over the next decade to 50%, the government and the mining company said on Saturday. The Botswana government and De Beers said they had agreed on a 10…
