platinum ring with aquamarine and diamond

A spectacular platinum Art Deco ring with an emerald cut aquamarine (app. 8.5 carats) surrounded by old cut diamonds and on the side are three baguette cut diamonds in different sizes, the shank is set with 21 diamonds brilliant cut diamonds (app. 1.75 carats in total), England, circa 1920.

weight: 8.85 grams
ring size: 18.5 mm / 8.5 US.
width: 1.25 – 20 mm