Debswana, a joint venture between Anglo American unit De Beers and Botswana's government sells 75% of its output to De Beers, with the balance taken up by the state-owned Okavango Diamond Company.
According to data published by the central bank, sales of diamonds from Debswana stood at $2.622 billion in the six months to June compared to $1.703 billion in the same period last year.
In local currency terms, rough sales jumped 68.4% to 31 billion pula due to a stronger dollar in the period. Central bank data shows the pula has depreciated by around 5% against the U.S. dollar in the six months to June 2022.
Debswana accounts for almost all Botswana's diamond exports, with Lucara Diamond Corp's Karowe mine being the only other operating diamond mine in the country.
Botswana gets about 30% of its revenue and 70% of its foreign exchange earnings from diamonds.
The country's finance minister Peggy Serame said on Wednesday that a 1.8-billion-pula inflation-relief package, which will be introduced in August, will not widen the annual budget deficit due to the extra revenue from the stronger than anticipated diamond sales in the first half of the year.
(Reporting Brian Benza in Gaborone; Editing by Anait Miridzhanian and David Evans)
