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PRAGUE, CZECH REPUBLIC - MARCH 27: The Queen Wearing A Sapphire And Diamond Tiara And Necklace Attending A State Banquet Given By President Havel, Prague, Czech Republic. (Photo by Tim Graham/Getty Images)

PRAGUE, CZECH REPUBLIC - MARCH 27:  The Queen Wearing A Sapphire And Diamond Tiara And Necklace Attending A State Banquet Given By President Havel, Prague, Czech Republic.  (Photo by Tim Graham/Getty Images)