Princess Diana, right, is seen in 1997 wearing one of her trademark jewels: an emerald-cut ring with an aquamarine stone. Duchess Meghan, left, is seen wearing the same ring while she and Prince Harry, Diana's son, head to the reception following their wedding.

Hours after the former Meghan Markle exchanged vows with Prince Harry at St. George's Chapel in Windsor, England, she emerged for the evening celebrations wearing another very meaningful piece of jewelry: a ring...

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