A Sotheby’s employee holds what is purported to be the largest brilliant-cut D-color flawless diamond during a preview at Sotheby’s in Geneva, Switzerland, Monday, Oct. 1, 2007. This unique diamond, weighing 84.37 carats, is estimated to be worth US$15 to 16 million (euro 10.5-11.2 million). It will be sold on Nov. 14 at an auction called ‘Magnificent Jewels’ in Geneva.