A diamond ring. Photo Christie's Image Ltd 2014

The marquise-cut diamond weighing approximately 8.50 carats, between channel-set rectangular-cut emerald shoulders, raised on a plain hoop, finger size L Estimate £50,000 - £70,000 ($83,700 - $117,180). Price Realized £158,500 ($264,854)

Accompanied by report no.20015987 dated 10 April 2014 from AnchorCert, Birmingham, stating the 8.50ct diamond is H Colour, VVS1 Clarity, Type IIA, no fluorescence

Christie's. IMPORTANT JEWELS,4 June 2014, London, King Street - http://www.christies.com/