That may sound like a nice idea, but it's a expression about your principles where she has deal with all of the consequences. The ring is for her, she will be t

That may sound like a nice idea, but it's a expression about your principles where she has deal with all of the consequences. The ring is for her, she will be the one who has to explain this decision to everyone who asks about the ring (read: absolutely everyone in her life). Many of these people will have diamond wedding rings, so now she has to explain this decision in a way to doesn't offend them. No offense, but she may prefer to spend that time gushing about how excited she is about her upcoming marriage and how awesome her fiancé is. The ring does have functional value, but for her and not for you. Part of the point is that is doesn't directly benefit you at all.