An emerald ring, early 20th century

platinum standard 0,900, engraved detail, 2 diamonds weighing in total approx. 0,25 ct G-H/SI1, 4 8/8 cut diamonds weighing in total approx. 0,03 ct, 1 octagonal cut emerald weighing approx. 0,80 ct, size: 15, weight: 2,47 g; accompanied by a gemmologist’s certificate