Lab Grown Emerald Ring handcrafted in solid 18ct white gold. Single 4.5 ct lab grown emerald. Emerald cut. Available from sizes H to Z including half sizes. Size: 11.9 mm (0.47 in). Material: 18ct White Gold. Total metal weight: 2.7 gr. 1 emerald cut lab grown emerald (12 x 10 mm) = 4.5 ct. Colour: Green. Stone cut: Emerald Cut. Anniversary: 20th Anniversary 35th Anniversary. Birthstone: May.