A DIAMOND the size of a tennis ball which is the largest discovered in more than a century could sell for as much as $90million, 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.