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

The brilliant-cut diamond weighing approximately 10.52 carats, raised in a claw setting to the plain shoulders and hoop, Austrian marks for 18 carat gold, finger size K. Estimate £80,000 – £120,000 ($133,920 - $200,880)

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