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A marquise is a curved navette; a Dutch Marquise is an elongated hexagon with six straight sides. Here is how they compare in size and on the hand.

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At the same carat weight and ratio, an elongated cushion and a radiant measure the same. The corners and the sparkle are what set them apart.

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At the same carat weight, a marquise measures 54% longer than a round. Here is every shape ranked by size, and what that means on the hand.

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