A single-stone diamond ring. Photo Christie's Image Ltd 2014

The brilliant-cut diamond weighing approximately 13.86 carats, claw-set to a loop connection on the plain polished hoop, finger size K.Estimate £50,000 - £60,000 ($83,700 - $100,440). Price Realized £104,500 ($174,620).

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