Ceylon sapphire and diamond geometric cluster ring

Ceylon sapphire and diamond geometric cluster ring in platinum and 18kt yellow gold. Centred with a cushion shape mixed cut Ceylon sapphire with no indications of heat treatment in a rubover setting, bordered by a mix of round old cut diamonds in grain settings and rectangular baguette cut diamonds in channel and rubover settings, to an octagonal cluster design with millegrain intervals and intricately pierced open gallery, further enhanced by raised diamond set shoulders which smooth to a solid shank.