Rare 35.6 carat 17th Century Grey-Blue Diamond To Be Auctioned At Christie's!!!

The Wittelbach diamond, a rare 35.6 carat 17th century grey-blue diamond, is to be auctioned at Christie's auction house in London on Dec. 10, 2008. It was part of the dowry of the Infanta Mararita Teresa upon her engagement to Leopold I of Austria. The diamond is expected to sell for a whopping 13 million U.S. dollars at auction.