A diamond necklace with an illustrious, if mysterious, past sold at Sotheby’s Geneva yesterday for $4.7 million, outstripping its top estimate of $3.8 million, or 2.2 million Swiss francs.

A diamond necklace that has been worn at two British ... hanging down on either side or with the piece tied in a simple knot.A glittering scandalSome of the diamonds from the necklace may have ...

The necklace, which has been worn at two British coronations, smashed auction house estimates at a jewelry sale in Switzerland on Wednesday.