A coloured diamond and diamond pendent necklace. Photo Christie's Image Ltd 2013

Suspending a pear-shaped fancy intense yellow diamond weighing approximately 17.59 carats, within a marquise-cut diamond surround, extending to the neckchain, mounted in 18k white and yellow gold, 41.0 cm long. Price Realized $671,773

Accompanied by report no. 2145319859 dated 11 May 2012 from the Gemological Institute of America stating that the 17.59 carat diamond is fancy intense yellow, natural colour, VS2 clarity

Christie's . HONG KONG MAGNIFICENT JEWELS.28 May 2013. Convention Hall - http://www.christies.com