From Reuters:

The Annenberg diamond is a 32.01 carat D color Flawless emerald shaped boulder mounted in a ring flanked by two 1.5 carat pear shaped diamonds.  The diamond will be auctioned this fall at Christie’s in New York.  It is expected to fetch over $5 million.

Christie’s hopes this diamond is as much of a success as the Wittelsbach diamond, auctioned in December, that fetched $24.3 million.  The Wittelsbach diamond is a 35.60 carat fancy vivid blue diamond.