Ring in platinum, yellow gold, diamonds and emerald

MATERIAL: platinum, yellow gold, diamond and emerald DESCRIPTION: ring made of cabochon-cut emerald, embellished the sides by two old-cut diamonds, complete with a certificate issued by the Gemmological Certification Services, London MEASURES: ring 15 WEIGHT: 20.10 ct Emerald , diamonds ct 0:20, 6.5 gr