Sotheby’s has revealed a historic and significant diamond on Monday that is poised to be the centerpiece of its upcoming Royal and Noble sale in Geneva on Nov. 11. This rare 18th-century jewel, which has remained in private collections for decades, is expected to fetch between $1.8 million and $2.8 million.
Weighing approximately 300 carats, the jewel includes three rows of old mine brilliant-cut diamonds and is finished with diamond tassels at the end; when worn, it resembles a […]
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