An Art Deco emerald, natural pearl and diamond bracelet. Photo: Christie's Images Ltd 2013

Designed as a graduated series of five emerald beads, spaced by single-cut diamond rondelles, to the natural pearl bracelet, measuring from approximately 5.77 x 5.63 to 4.46 x 3.96 mm, with two emerald bead terminals and rose-cut diamond clasp, mounted in platinum, circa 1930, 6 ins. Estimate:  $15,000 – $20,000

With report 2125065907 dated 7 May 2010 from the Gemological Institute of America stating that the pearls are natural saltwater pearls. No indications of treatment

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