Art-Deco Platinum Diamond, Onyx And Emerald Ribbon Bow BroochLadies beautiful Art deco era platinum ribbon bow brooch set with old rose cut and old mine cut diamonds, onyx and emerald. This brooch centers a bezel set Old Mine cut diamond weighing approximately 1. 15 carat of (SI 2) in clarity and (J) in color. 3" in length. Circa 1925 (+ ). Very Good Condition. Accompanied by a Van Rijk appraisal certificate