Edwardian era, bezel set 8ct +/- aquamarine pear in 18k gold, set sideways on an antique, 22k gold band.
Approximately a size 6.75. Central aquamarine measures 12.6mm by 8.8mm wide and 5.6mm thick. Hallmarks on band for Birmingham, 22k gold, a date mark of 1921, with a makers mark “H W”. Weight is 3.89 grams.