I know with engagement rings it is proper for the women to return it.
Most Helpful Guy
well id leave it as her chocie to do as she wishes
break ups happen and also depends why you break up if tis because of moving away etc and leading diffferent lifestyles then it might be nice as a momento of the other person and reminder to stay in touch
but at the end of the day he gave it to you as gift so id expect her to do with it what she will