A Belle Époque 16.10 carats modified cushion-cut fancy yellow diamond and diamond ring. Estimate $150,000 – $200,000. Photo Christie's Image Ltd 2015.

Set with a modified cushion-cut diamond, weighing approximately 16.10 carats, to the single-cut diamond gallery and shoulders, trimmed with French-cut sapphires, mounted in platinum, circa 1915

With report 2165934440 dated 13 January 2015 from the Gemological Institute of America stating that the diamond is fancy yellow, natural color, VS1 clarity

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