Tennis ball-sized diamond 'could fetch €63m'
A diamond the size of a tennis ball which is the largest discovered in more than a century could sell for as much as £50 million (€63.02m), according to Sotheby's.
The auctioneers will offer the Lesedi la Rona diamond for sale in London on June 29.
The gemstone was unearthed in November in Botswana at a mine owned by Canada's Lucara Diamond Corporation.
It measured 1,109 carats, making it the second-largest gem-quality rough diamond ever discovered.
Its name means "our light" in the Tswana language.
The auctioneer said the rough gemstone could yield the largest top-quality diamond ever cut and polished.
The largest diamond ever found was the 3,106-carat Cullinan diamond, unearthed in South Africa in 1905. It was cut into nine pieces that form part of the UK Crown Jewels.