The Sun-Drop diamond has sold for a staggering $10.9 million (plus buyer's premium). A world record for a yellow diamond. We discuss a bit of its science with Professor Martyn Poliakoff. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos Periodic Videos films are by video journalist Brady Haran