S.O. wearing ex's jewelry?

[El Jefe]

So I was curious about this. Do you think it's ok for your significant other to wear jewelry or clothing articles from their previous significant others? My girlfriend has a few very minor jewlery pieces that she has from past relationships. I don't really care that much, except for a necklace she has from a previous boyfriend that I really don't like, but it's an annoyance that I can deal with. Is there some form of etiquette on this topic? If she had a ton of it, then I would probably be a little more annoyed. I'm sure a lot of you have had similar issues, just curious if it bothered you or not.