An Art Deco Platinum, Diamond and Natural Pearl Bar Brooch, in an open geometric design accented with millegrain edgework and a pierced double gallery, containing five pearls measuring approximately 4.88-6.40 mm in diameter, together with 31 old mine, old European and old single cut diamonds weighing approximately 2.60 carats total, and numerous rose cut diamonds.Accompanied by a Gemological Institute of America pearl identification certificate number 5161657251, dated October 3, 2014, stating Pearls: Natural, Environment: Saltwater, Species: Pinctada, Treatment: No indications of treatment, Shape: Button, Bodycolor: White, Overtone: Orient. 8.80 dwts.