Emerald cut engagement rings are usually considered one of the most elegant of diamond shapes. After all, it is the stone on Grace Kelly’s engagement ring given to her by Prince Rainier of Monaco.

Every item on this page was chosen by a Town & Country editor. We may earn commission on some of the items you choose to buy. Jennifer Lopez has become something of an engagement ring influencer.

The 100-carat Emerald-cut perfect diamond joins five similarly rare stones in auction history. (Photo courtesy Sotheby’s) Today, Sotheby’s announced that a rare Emerald-cut 100.2-carat perfect diamond ...