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A woman holds a 478 carat sapphire which was previously owned by Queen Marie of Romania 08 October 2003 at Christie's in London. The piece highlights Christie's Geneva jewellery auction 19 November as the largest sapphire ever offered at auction and is estimated to fetch between 1,2 and 1,8 million Swiss Francs (775,000 and 1,163,000 Euros) AFP PHOTO/Jim WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

A woman holds a 478 carat sapphire which was previously owned by Queen Marie of Romania 08 October 2003 at Christie's in London. The piece highlights Christie's Geneva jewellery auction 19 November as the largest sapphire ever offered at auction and is estimated to fetch  between 1,2 and 1,8 million Swiss Francs (775,000 and 1,163,000 Euros)  AFP PHOTO/Jim WATSON  (Photo credit should read JIM WATSON/AFP/Getty Images)