The diamond was extracted from Karowe mine in Botswana. There are very low amounts of impurities within this stone, according to the company. “This has been an amazing week for Lucara with the recovery of the second largest and also the sixth largest gem quality diamonds ever mined. We are truly blessed by this amazing asset,” William Lamb, president and CEO of Lucara, said.There is no way to guess where this diamond could be priced because nothing remotely similar to it has ever been sold in the modern tender process.Two white diamonds, an 813 carat stone and a 374 carat stone were also found on the same mine. Lucara Diamond is a public stock traded in Toronto. The Karowe mine entered production in 2012 and produces less than one per cent of the world’s diamonds. There is possibility that this mine could hold more stones of this caliber.The largest diamond ever found was the Cullinan stone, 3,106.75 carats ,from South Africa, more than 100 years ago.