A nearly 25-carat pink diamond ring, which Sotheby's calls the world's most expensive diamond, sold for $46.2 million at the auction house in Geneva in 2010. Sotheby's dubs the sale of this emerald-cut gem the record for any jewel at auction.
A nearly 25-carat pink diamond ring, which Sotheby's calls the world's most expensive diamond, sold for $46.2 million at the auction house in Geneva in 2010. Sotheby's dubs the sale of this emerald-cut gem the record for any jewel at auction.