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A dazzling, 18th-century diamond necklace with ties to royalty could fetch up to $2.8 million at Sotheby's Royal and Noble ...

A diamond necklace that has been worn at two British coronations, and is thought to have stones from the infamous necklace at ...

Some of the diamonds from the necklace may have come from the piece at the heart of the "Affair of the Diamond Necklace" ...