This undated image made available by the Royal Collection shows the Coronation Necklace and Earrings, part of a exhibition of royal gems being staged to mark the Queen’s 60-year reign at the Queen’s gallery, Buckingham, Palace, London, on Tuesday May 15, 2012. The major display will reunite for the first time seven of the nine principal stones cut from the Cullinan Diamond. The Diamonds: A Jubilee Celebration exhibition will be held from June 30 to July 8 and from July 31 to October 7. (AP Photo/Royal Collection)