An important ruby and diamond ring. Photo: Christie's Images Ltd 2014

Set with a cushion-cut ruby, weighing approximately 8.05 carats, flanked on either side by a shield-shaped diamond, mounted in 18k gold and platinum. Estimate $1,000,000 – $1,500,000

With report 1001641 dated 25 January 2010 from the Gübelin Gem Lab stating that gemmological testing revealed characteristics consistent with those of rubies originating from Burma (Myanmar). No indications of heating

Christie's. MAGNIFICENT JEWELS, 16 April 2014, New York, Rockefeller Plaza - www.christies.com