A Fine Platinum, Yellow Gold, Emerald and Diamond Necklace, Oscar Heyman Brothers, consisting of 18 karat yellow gold basket settings containing 34 graduated octagonal step cut emeralds weighing approximately 30.00 carats total alternating with platinum links containing 102 marquise shape brilliant cut diamonds weighing approximately 10.00 carats total in three stone clusters.Hand inscribed: PLAT (maker's mark for Oscar Heyman Brothers) 601405. 36.80 dwts.