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LONDON, UNITED KINGDOM - NOVEMBER 24: The Queen Wears The King George Iv State Diadem Which Is Decorated With Symbolic Roses, Shamrock And Thistle. It Was Worn By Queen Victoria And Queen Alexandra. The Queen Traditionally Wears It For The State Opening Of Parliament. (Photo by Tim Graham Photo Library via Getty Images)

LONDON, UNITED KINGDOM - NOVEMBER 24:  The Queen Wears The King George Iv State Diadem Which Is Decorated With Symbolic Roses, Shamrock And Thistle.  It Was Worn By Queen Victoria And Queen Alexandra.  The Queen Traditionally Wears It For The State Opening Of Parliament.  (Photo by Tim Graham Photo Library via Getty Images)