Pearl Square Ring 18ky 16mm with guard rings

18k yellow gold, square ring with 16mm white mabe pearl rimmed with18k yellow gold.  Tapered band 10 mm to 7 mm wide  x 1.5 mm thick.  Flanked by 18k yellow gold square rings inset with .33 ct pave diamonds. 3 mm wide x 1.5 mm thick.