tiara\\"Jewelry For Kate Middleton"\\Photo: Courtesy of Roberto Coin / The Knot (Courtesy of Roberto Coin / The Knot)

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The Tiara
Princess Diana Spencer's tiara had intricate swirls and flowers made of diamonds. We expect Kate's ceremony crown to be equally decadent and, of course, loaded with diamonds -- like this one by Roberto Coin

By Heather Levine

From The Knot