The Magnificent Jewels Auction is set to take place on the 18th October and will be lead by a 32.77 carat, vivid fancy yellow diamond estimated to sell for more than $6 million (£3.6 million).
The yellow hue of this 32.77ct pear shape diamond is so intense that the Gemological Institute of America (GIA) ranks it amongst the rarest of gemstones in its class.
Rahul Kadakia, head of the jewellery for Christies America said: 'The Vivid Yellow literally blazes with colour, unlike any yellow diamond I've ever seen. In the world of diamonds, a naturally coloured stone of this incredible colour and size represents a freak occurrence -an extremely rare geological phenomenon. The appearance of this extraordinary gemstone on the market truly represents a once in a lifetime opportunity for top jewellery collectors.'
The stone is expected to achieve in excess of $6 million. The stone also has the potential to surpass the per-carat price of $203,000 achieved for the Golden Drop, a pear-shape 18.49 ct yellow diamond sold in June 1990 at Christie's London.