A man holds a 478 carat sapphire (L) which was previously owned by Queen Marie of Romania, Belle Epoque necklace (C) with cushion-shaped sapphire weighing 47.64 carats and pear-shaped diamond of 26.98 carats datring circa 1910 (estimated to fetch between 1,4 and 2,1 million Swiss Francs - 905,000 and 1,357,000 Euros) and oval shaped diamond of 63.93 carats, D colour, flawless (not estimated) 08 October 2003 at Christie's in London. The 478 carat sapphire 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 man holds a 478 carat sapphire (L) which was previously owned by Queen Marie of Romania, Belle Epoque necklace (C) with cushion-shaped sapphire weighing 47.64 carats and pear-shaped diamond of 26.98 carats datring circa 1910 (estimated to fetch between 1,4 and 2,1 million Swiss Francs - 905,000 and 1,357,000 Euros) and oval shaped diamond of 63.93 carats, D colour, flawless (not estimated) 08 October 2003 at Christie's in London. The 478 carat sapphire 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)