Exports of rough diamonds mined by the Debswana Diamond Company fell 30% in 2020, statistics released by the Bank of Botswana showed Friday, as the coronavirus pandemic hit demand and global travel restrictions impacted trading. Debswana, a joint venture between Anglo American unit De Beers and the Botswana government, produces almost all of the southern African nation’s diamonds. Lucara’s Karowe mine is the only other operating diamond mine in the country.