Rahul Kadakia, senior vice president and head of the Jewelry Department at Christie's Auction house, holds up 'The Orange' diamond during a media preview in New York, October 11, 2013. 'The Orange' is the largest fancy vivid orange diamond known to exist with a carat weight of 14.82 carats and is expected to fetch up to $20 Million USD at auction November 12 in Geneva. REUTERS/Carlo Allegri (UNITED STATES - Tags: BUSINESS SOCIETY)