Vintage ring with emeralds and diamonds

An 18 carat yellow gold ring with a horizontal stripe of beautiful clear square-cut emeralds, in the center an oval, cabochon-cut emerald. Above and below it the gold slopes downwards and is completely set with various sizes of brilliant-cut diamonds. Maker's mark HK in a rectangle. Ring size: 16.5 mm (can be adjusted if necessary).

Europe, circa 1980