Most expensive diamond sold at auction: The Pink Star breaks Guinness world record (VIDEO) HONG KONG, China -- The 59.60-carat pink diamond Pink Star diamond has become the world's most expensive gemstone, selling at auction for $71.2 million (£57.3 million) including buyer's premium, according to the World Record Academy: http://www.worldrecordacademy.com/business/most_expensive_diamond_sold_at_auction_The_Pink_Star_breaks_Guinness_world_record_217086.html
Next Video
Largest free standing Rubik's Cube: University of Michigan set...
Redirecting You in 3 Seconds.