UNITED KINGDOM - JULY 27:  Made by Garrards in 1893 this silver and diamond tiara was a wedding present for the future Queen Mary from the Girls of Great Britain and Ireland, displayed at Buckingham Palace in London, U.K., Friday, July 27, 2007. Buckingham Palace, Queen Elizabeth II's London home, opens to visitors tomorrow, marking her 60th year of marriage with an exhibition of dresses, diamonds and uniforms worn at her wedding.  (Photo by Carl Court/Bloomberg via Getty Images)