Christie's Jewellery specialist Helen Molesworth holds up a coloured diamond pendant during an auction preview in Geneva May 11, 2007. This orange-brown briolette-cut diamond weighing 100.60 carats within a pave-set diamond hook-and-eye clasp will be sold during a sale in Geneva May 17, 2007 and is expected to fetch from $ 1,000,000 - to $1,200,000. REUTERS/Denis Balibouse (SWITZERLAND)