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NEPAL - FEBRUARY 17: Queen Elizabeth II wears 'Granny's Tiara' to a banquet in Nepal, The tiara was originally given to Queen Mary on her marriage and is made of diamond festoons, scrolls and collet spikes, It is worn with a diamond fringe necklace, a gift from King Faisal of Saudi Arabia (Photo by Tim Graham Photo Library via Getty Images)

NEPAL - FEBRUARY 17:  Queen Elizabeth II wears 'Granny's Tiara' to a banquet in Nepal, The tiara was originally given to Queen Mary on her marriage and is made of diamond festoons, scrolls and collet spikes, It is worn with a diamond fringe necklace, a gift from King Faisal of Saudi Arabia  (Photo by Tim Graham Photo Library via Getty Images)

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NEPAL - FEBRUARY 17: The Queen In Nepal Wearing The Tiara Known As 'granny's Tiara' Originally Given To Queen Mary On Her Marriage And Made Of Diamond Festoons, Scrolls And Collet Spikes Worn With A Diamond Fringe Necklace A Gift From King Faisal Of Saudi Arabia (Photo by Tim Graham Photo Library via Getty Images)

NEPAL - FEBRUARY 17:  The Queen In Nepal Wearing The Tiara Known As 'granny's Tiara' Originally Given To Queen Mary On Her Marriage And Made Of Diamond Festoons, Scrolls And Collet Spikes Worn With A Diamond Fringe Necklace A Gift From King Faisal Of Saudi Arabia  (Photo by Tim Graham Photo Library via Getty Images)

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PARIS, FRANCE - JUNE 10: Queen Elizabeth II Queen wearing the Mary's Girls Of Great Britain And Ireland Tiara and The King Faisal Of Saudi Arabia diamond necklace, attends a banquet with President Mitterrand and wife Danielle Mitterrand on June 10, 1992 in Paris, France. (Photo by Anwar Hussein/Getty Images)

PARIS, FRANCE - JUNE 10:  Queen Elizabeth II  Queen wearing the Mary's Girls Of Great Britain And Ireland Tiara and The King Faisal Of Saudi Arabia diamond necklace, attends a banquet with President Mitterrand and wife Danielle Mitterrand on June 10, 1992 in Paris, France. (Photo by Anwar Hussein/Getty Images)