A pair of sapphire and diamond ear clips, by Verdura. Photo: Christie's Images Ltd 2013

Each designed as a half moon-shaped cluster of cushion-cut sapphires interspersed with circular-cut diamonds, mounted in platinum, in a Verdura navy leather case. Signed Verdura. Estimate:  $12,000 – $15,000 

THE DIANA DOLLAR KNOWLES COLLECTION 

Christie's. MAGNIFICENT JEWELS. 15 October 2013. New York, Rockefeller Plaza.