A 12.52 carats cushion-cut diamond ring. Estimate $140,000 – $220,000. Photo Christie's Image Ltd 2015.

Set with a cushion-cut diamond, weighing approximately 12.52 carats, to the circular-cut diamond prongs and bifurcated half-hoop, mounted in platinum.

Christie's. MAGNIFICENT JEWELS, 14 April 2015, New York, Rockefeller Plaza