Victoria Beckham: 15-17 carats

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When David Beckham first proposed to the former Spice Girl in 1998, he did so with a modest (by celebrity standards) 3-carat marquise-cut diamond on a yellow band. Since then, Victoria has upgraded to a collection of 14 engagement rings from the soccer star, including a pear-shaped diamond that is estimated to be between 15- and 17-carats.

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