NEW YORK , United States (AFP) — A massive diamond valued at more than $70 million will go under the hammer in London next month, the Sotheby’s auction house said Wednesday. Known as “Lesedi la Rona,” it was found nine months ago in Botswana by the Lucara Diamond Corp. “It’s a 1,109-carat diamond,” said David Bennett, worldwide chairman of Sotheby’s International Jewellery Division said in unveiling it. “This is the largest discovered in over a […]