The press gathered at Sotheby's in London for the unveiling of an unusual and very precious jewel: the 100.20 carat Ultimate Emerald-Cut Diamond, which will be auctioned at Sotheby's New York this April.

The press gathered at Sotheby's in London for the unveiling of an unusual and very precious jewel: the 100.20 carat Ultimate Emerald-Cut Diamond, which will be auctioned at Sotheby's New York this April.