Edwardian reddish purple tourmaline and diamond cluster ring

Edwardian reddish purple tourmaline and diamond cluster ring in platinum and 18kt yellow gold. Centrally set with an oval reddish purple tourmaline in a millegrain setting, encircled by a row of round eight cut diamonds in grain settings, with six raised round Old European cut diamonds in millegrain settings, to an impressive fancy oval cluster supported by cheniers and intricate openwork gallery, flanked by raised inwardly tapering shoulders with diamond set accents, terminating to a ribbed shank.