18K (750) gold ring set with a rectangular emerald surrounded by 12 round old-cut diamonds. Finger size : 51. Gross weight: 4.9 g. Size of the emerald: 10.3 x 8.2 x 4.9 mm approx. The emerald is accompanied by a GEM-Paris report (2022) attesting: origin Colombia, modification by insignificant oil impregnation not affecting the appearance of the stone (chips, small lack of material) A Colombian (lab. fair oil) and diamonds ring