The 59.6 carat Pink Star Diamond is displayed at Sotheby's auction house in Hong Kong. Wow! This image appears in the gallery:Weird & Wonderful Pictures Of The Week - 4th October 2013 11. The 59.6 carat Pink Star Diamond is displayed at Sotheby's auction house in Hong Kong. Wow! 16 images See the full gallery: Weird & Wonderful Pictures Of The Week - 4th October 2013