The Botswana government has signed a new diamond sales agreement crucial to its economy with the De Beers mining company after seven years of negotiations.

Under the final deal, the share of Botswana's state-owned Okavango Diamond Company (ODC) in the production of Debswana - its 50-50 joint venture with De Beers - will reach 40% at the end of the agreement, revised from a provisional 50%.

Botswana’s government and De Beers, the diamond mining unit of Anglo American, have finalised a 10-year diamond sales agreement after a protracted negotiation period, Reuters reported on Tuesday. This new agreement replaces a provisional deal and includes a potential extension of five additional years.