An Art Deco Platinum, Burmese Sapphire and Diamond Ring, Noble & Co., containing one round double cabochon cut sapphire measuring approximately 15.26 x 15.24 x 11.42 mm and weighing approximately 27.90 carats set within an intricately hand engraved basket setting with claw prongs at the compass points and accented with six old European and transitional brilliant cut diamonds weighing approximately 0.17 carat total.Stamp: NOBLE & CO. PT.Accompanied by a Gubelin Gem Laboratory sapphire identification and origin certificate number 14105193, dated October 27, 2014, stating Species: Natural Corundum, Variety: Sapphire, Origin: Burma (Myanmar), Enhancement: No indications of heating. 7.70 dwts.