10ct Ceylon sapphire and diamond oval cluster ring in platinum

10ct Ceylon sapphire and diamond oval cluster ring. Centrally set with a 10ct oval mixed cut Ceylon sapphire with no indication of heat treatment, in a raised claw setting, encircled by a row of round cut diamonds in grain and rubover settings, to a floral cluster design with curving claws and scalloped edging, decorated with an openwork gallery and flanked to either side with raised inwardly tapering shoulders which smooth to a solid shank. Marked platinum. Accompanied by Gemological Certification Services certificate.