The auction house at Christie has encountered the largest colourless diamond to have appeared for auction in the last 18 years. The diamond is a VVS1 F-colour 101.27 carat stone, measuring 28.62 x 33.54 x 19.86 mm. It is expected to have a sale price of over $6 million. Christie will offer this diamond at a jewellery sale in Hong Kong on May 28, considering the upcoming Asian luxury market. The diamond has been cut from a 460 carat rough diamond found at the Premier mine in South Africa.%%“Only three colourless diamonds of over 100 carats have ever appeared at auction, all sold in Geneva,” said Christie’s chairman of jewellery Francois Curiel. Sotheby holds a gemstone which garnered $16.5 million for the 100.1-carat “Star of the Season'” pear-shaped colourless diamond in Geneva in May 1995.