Sotheby's has announced it will sell a magnificent 101.84 carat diamond, the largest D color, internally flawless diamond ever to be offered at auction. The diamond will highlight Sotheby's sale of Magnificent Jewelry at the Beau-Rivage Hotel in Geneva on Nov. 4. A spokesman anticipates the stone will fetch around $13 million. Since the diamond was only recently cut and has never been worn, the new buyer will have the privilege of giving a name to one of the world's most magnificent gems.