CHAUMET18K (750) white gold and platinum ring set with a square emerald surrounded by calibrated diamonds. Signed. French work of the 1970s. Finger size : 55. Gross weight: 8 g (open frosts, shocks) The emerald is accompanied by a GEM Paris report (2022) attesting: origin Colombia, modification by moderate oil impregnation not significantly affecting the appearance of the stoneA 1970 Chaumet platinum and gold ring set with an emerald (Colombia, moderate oil) and diamonds