Ceylon sapphire and diamond coronet cluster ring, circa 1920.

Ceylon sapphire and diamond coronet cluster ring. Set to centre with a cushion shape old cut natural no heat Ceylon sapphire in an open back rubover setting with an approximate weight of 10.00 carats, adorned by thirty two cushion shape old mine diamonds in open back grain settings with a combined approximate weight of 0.85 carats, and further encircled by twenty calibre cut natural no heat sapphires in open back rubover settings with an approximate weight of 1.20 carats, to an elegant elongated cluster design featuring millegrain edges, an intricately pierced scrolling gallery and fancy shape open backhoing, flanked by finely tapering shoulders flowing through to a solid D-shape shank. Marked platinum, circa 1920, accompanied by Gemmological Certification services report #5786-2802.