1950's Platinum Gubelin Certified Colombian Emerald & Diamond Necklace

1950's Platinum Gubelin Certified Colombian Emerald & Diamond Necklace Weighing 81.8 grams Set with 11.46 Ct. Gubelin Certified Colombian Emerald Along with 257 Round Diamonds weighing app. 28.00 Ct. 36 Marquise Diamonds weighing app. 4.00 Ct. and 34 Emerald-cut Diamonds weighing app. 10.50 Ct. G-H Color, VVS-VS Clarity 17.5 inches in length