Art Déco Superb emerald ring +/- 20.46 ct Platinum Art Déco ring set with an exceptional emerald-cut Colombian emerald of +/- 20.46 ct. The shoulder of the ring is set with 4 diamond bars. The under gallery is set with small 8/8 diamonds. Hallmark: none, n° 9413. Gross weight: 10.2 g; TD: 53