18K (750) gold and platinum band ring, set with an octagonal emerald between two lines of baguette-cut diamonds, shouldered by stylized foliage set with round brilliant-cut and navette-cut diamonds. French work, late 20th century. Finger size: 54/55. Emerald size: 11.3 x 8.3 x 7.6 mm. Gross weight: 18.1 g (flush frost) The emerald is accompanied by a GEM Paris report (2023) attesting: origin Colombia, moderate oil impregnation not significantly affecting the stone's appearance. A Colombian emerald (moderate oil) and diamonds ring