LONDON, ENGLAND - JUNE 06:  A Christie's auction house employee wears The Rosebury pearl and diamond tiara, bracelet and brooch on June 6, 2011 in London, England. The jewels, which formerly belonged to Hannah, Countess of Rosebury, feature in Christie's 'Important Jewels' sale which take places in London on June 8, 2011.  (Photo by Oli Scarff/Getty Images)