Christie's and Sotheby's art sales use the Warhols, Van Goghs and Monets to attract attention. For the jewelry sales it's all about the diamonds. The Christie's Jewels: The New York Sale to be held on October 21 will feature the Annenberg Diamond, a square 32.01-carat, emerald-cut diamond graded D color, flawless, the rarest of the rare. The Annenberg diamond is flanked by two pear-shaped diamonds, of 1.5 carats and 1.61 carats, respectively mounted in a ring by David Webb. It is part of the Leonore Annenberg collection. The diamond ring has an estimated value between $3 million to $5 million. Rings like this get their own world tour and Christie's plans to showcase the diamond in Geneva, London, Hong Kong and Los Angeles before winding up back at Christie's Rockefeller Galleries as part of a viewing of the entire sale from October 16 to 20.