AN ART DECO COLORED DIAMOND, DIAMOND, RUBY AND ONYX RING

AN ART DECO COLORED DIAMOND, DIAMOND, RUBY AND ONYX RING
Set with a circular-cut fancy light to fancy brownish greenish yellow diamond, with cabochon ruby and onyx detail, to the circular and single-cut diamond lozenge-shaped surround, mounted in platinum, circa 1920
With report 6167292352 dated 24 June 2014 from the Gemological Institute of America stating that the diamond is fancy light to fancy brownish greenish yellow, natural color. Additional comment: color graded insofar as mounting permits