Open rings are a thing of rareness. This requiring form normally absorbs more gold, because both arms should be strengthened, so that they do not buckle. Key is also selecting the appropriate proportions of the entire project.
In order to hide the symmetry of the ring, I implemented two sizes of cabochon cut stones. Larger gem would be sapphire or topaz. The second is tsavorite – an exotic mineral of better parameters from emerald.