By Erika Winters
A 13.22-carat flawless fancy vivid blue diamond will be auctioned at Christie's Magnificent Jewels Sale in Geneva on May 14. The rare gem--known as the largest flawless fancy vivid blue diamond in the world--was displayed at Christie's New York on April 11. And in the video below, Christie's head of jewelry Rahul Kadakia explains its rarity and why blue diamonds command some of the highest prices at auction worldwide. The diamond, named "The Blue," is expected to sell for $21 to $25 million at the upcoming Geneva auction.
