Cocktail ring, in platinum and emerald

Cocktail ring set with an emerald and diamonds. In 950 platinum. One cabochon-cut emerald, weighing approximately 7.65 ct, surrounded by 18 brilliant-cut diamonds, totaling approximately 1.80 ct (each diamond weighing approximately 1.10 ct). Width at the top: 2.11 cm. Ring size: 51. Total weight: 16.31 g. Hallmarked with a dog's head. Excellent condition.