Art Deco style sapphire and diamond three stone ring

Art Deco style sapphire and diamond three stone ring in 18kt white gold. Centrally set with an estimated 0.30ct round mixed cut sapphire in a square collet setting, flanked to either side with two round brilliant cut diamonds in square collet settings, to a three stone design with step borders chaised gallery and raised square shoulders which curve to a solid shank. Marked 18kt gold.