The second largest diamond in history was excavated from a mine in Botswana by a Canadian mining company.
Lucara Diamond Corp has discovered a 1758-carat diamond that is larger than ball tennis and weighs nearly 352 grams, just three years after making a separate opening record in 2015.
The company was struggling to sell the so-called "Lesedi La Rona" 1,109-carat so far, after failing to meet its undisclosed reserve price in June 2016.
Eventually, it was bought for $ 53 million by the British dealer Graff Diamonds almost two years later.
According to Forbes 67 stones were cut out of the stone.
After the last statement, Lucara's shares rose 11.4 percent to its highest levels for more than two months before closing 6.3 percent.
The stone is second only to the famous 3,106-carat diamond diamond, which was found near Pretoria in South Africa in 1905.
Two of the polished gems cut by Kulinen, the Big Star of Africa and the Little Star of Africa, feature in British jewelery.
Lucara says she has recovered a number of high-quality diamonds in Karowe from the introduction of new technology and has discovered 12 stones over 300 carats, including a 72-carat and a 327-carat diamond in April 2018.
Eira Thomas, CEO of the company, said: "Karowe has already produced two diamonds with more than 1,000 carats in just four years, confirming the coarse nature of the resource and the likelihood of recovering extra, large and quality diamonds in the future."