LONDON, ENGLAND - MAY 15:  Caroline de Guitaut, Curator of Royal Collections, holds the Cullinan III and IV Broach and the Cullinan VII Delhi Durbar Necklace and Cullinan Pendant at The Queen's Gallery, Buckingham Palace on May 15, 2012 in London, England. Jewellery, made from the largest diamond ever found, will be shown to the public at the 'Diamonds: A Jubilee Celebration' exhibition which is part of the Summer Opening of Buckingham Palace from June 30th - 8th July 2012 and July 31st - October 7, 2012. Celebrating Queen Elizabeth II's Diamond Jubilee the exhibition will showcase seven of the 9 stones cut from the Cullinan Diamond - the remaining two from part of the Crown Jewels.  (Photo by Peter Macdiarmid/Getty Images)