MARTINI, Roma Ladies' signet ring in black-enamelled 18k (750‰) white gold set with a cut octagonal emerald (approx. 7.29 carats) in a surround of round diamonds Tdd : 55 Gross weight: 17 g Accompanied by a preliminary examination by the Laboratoire GEM Paris n° 20241977665 indicating : Origin: Colombia Treatment : Moderate oil Sold with a second setting by MARTINI, Roma in 18k (750‰) white gold entirely paved with brilliant-cut diamonds weighing approximately 6 carats (an imitation stone in the centre) Signed, hallmarked Tdd : 53 Gross weight: 16 g