Pearl Brooch. Mauboussin? platinum, emerald, diamond and pearl brooch with an 18kt gold brooch backing. Comprised of a single pearl measuring approx. 6.5mm, a single Old European cut diamond measuring approx. 4.0mm x 4.0mm, (5) OEC diamonds measuring approx. 3.0mm each, (27) round cut diamonds measuring approx. 2.0mm each, and (49) square faceted emeralds. Stamped verso, "07580 Depose" with an unidentified maker's mark and a French domestic gold hallmark of an eagle's head representing .750 or 18kt gold. By consignor provenance this brooch was purchased by their Father at Mauboussin in Paris. Accompanied by a hinged Mauboussin box. Total approx. weight is 10.1 dwt (gross). From a New Rochelle, NY estate. Dimensions: brooch measures approx. 1.46" w x 1.70" h.