Antique Burmese sapphire and diamond coronet cluster ring. Set with a cushion shape old cut natural unenhanced Burmese sapphire in an open back claw setting with an approximate weight of 2.10 carats, encompassed by a row of eighteen round eight cut diamonds in open back grain settings with a combined approximate weight of 0.20 carats, to an elegant oval cluster with millegrain highlights, a pierced gallery with stylised hearts and open backholing, the inwardly tapering shoulders flowing through to a solid slim D-shape shank. Marked platinum, signed 'Mappin' attributed to early Mappin & Webb, English, circa 1905, accompanied by Gemmological Certification Services report #5776-4704.
