An Art Deco Colombian emerald, diamond and onyx pendant, by Janesich. Estimate: $15,000 – $20,000. Photo Christie's Image Ltd 2015

The emerald bead, to the single-cut diamond and onyx surmount and cabochon ruby terminal, suspended by the circular-cut diamond bail, possibly of later addition, circa 1925, 2 3/4 ins., mounted in platinum - Signed Janesich

Accompanied by report no. CS 69616 dated 20 August 2015 from the AGL American Gemological Laboratories stating that it is the opinion of the Laboratory that the origin of this emerald would be classified as Colombia, with minor clarity enhancement, traditional type

Christie's. IMPORTANT JEWELS, 20 October 2015, New York, Rockefeller Plaza