Royal Blue Ceylon sapphire and diamond coronet cluster ring. Centrally set with a round old cut natural unenhanced Royal Blue Ceylon sapphire in an open back grain setting with an approximate weight of 2.08 carats, encircled by a single row of twelve round old cut diamonds in open back grain and cutdown settings with an approximate combined weight of 0.72 carats, to an elegant circular cluster with polished edges, an ornate openwork flowing motif gallery and intricate pierced backholing, flanked by inward tapered shoulders to a solid D-shape shank. Tested platinum, English, circa 1920, accompanied by Gemresearch Swisslab (GRS) report #021866.
