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PORTUGAL - MARCH 26: Queen Elizabeth II in Portugal wears a necklace and brooch of amethyst jewels which originally belonged to Queen Victoria's mother, The tiara known as 'Granny's Tiara' was originally given to Queen Mary on her marrriage (Photo by Tim Graham/Getty Images)

PORTUGAL - MARCH 26:  Queen Elizabeth II in Portugal wears a necklace and brooch of amethyst jewels which originally belonged to Queen Victoria's mother, The tiara known as 'Granny's Tiara' was originally given to Queen Mary on her marrriage  (Photo by Tim Graham/Getty Images)