4) L’Incomparable Diamond Necklace ($55 million)

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L’lncomparable diamond necklace was unveiled by the internationally acclaimed Mouawad jewelry company and still has the honor of being the most valuable piece of its kind in the world. The centerpiece of this necklace is the world’s largest internally flawless diamond, which is a massive 407.48 carats. The necklace features more than 100 small stones.

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