The world's second-biggest diamond has finally found a buyer and the 1,109-carat uncut stone has now fetched $53 million in a private sale to luxury jeweler Graff Diamonds. The seller, Canada's Lucara , recovered the huge diamond from Botswana's Karowe mine nearly two years ago. It named it Lesedi La Rona , which means "Our Light" in Botswana's Tswana language. Lucara had originally hoped to get at least $70 million for the stone, describing it as the biggest gem quality diamond found in more than a century. Lucara CEO, William Lamb said the price paid by Graff topped the highest bid received in the Sotheby's auction last year. But it falls short of the $63 million Lucara received last year for The Constellation, a smaller 813-carat uncut diamond. The only larger diamond previously unearthed was the 3,106-carat Cullinan Diamond , which was discovered in South Africa in 1905. The Cullinan was