RING IN 18K WHITE GOLD, EMERALD AND DIAMONDS 18k white gold ring set with a large oval emerald weighing approximately 17.98 ct. surrounded by brilliant-cut diamonds weighing approximately 0.54 ct. Marked: 'D0.54', 'E17.98' 'K18', '750'. size: 55-56 gross weight: 10.38 gr. 18K WHITE GOLD, EMERALD AND DIAMOND RING 18k white gold ring set with important oval emerald weighing approximately 17.98 ct., surrounded by brilliant cut diamonds weighing approximately 0.54 ct. Hallmark: 'D0.54', 'E17.98' 'K18', '750' size: 55-56 gross weight: 10.38 gr.