Rare and unusual Edwardian emerald and diamond halo ring with a central old European transitional cut diamond weighing 0.50cts surrounded by 0.90cts of old cut diamonds with outer graduating calibre emeralds milgrain set in a crenulated design. Diamonds set in platinum. Emeralds in 18ct gold. Head size 14.5mm. Low profile to finger. Shank has extra detail of groove to increase quality and fine goldsmithing. Finger size currently M 1/2 (U.S 6.5) Edwardian circa 1900