My ex had given me a "kuuipo" necklace at one point. I actually gave it back to him because it really made no sense for me to keep it. Especially since I was no one's "sweetheart."
But I received a necklace from a guy that I was dating. He actually gave it to me as a b-day gift after we broke up... and I wore it til it broke.
I've never really received large amounts of valuable jewelry in any relationship anyway so I guess it doesn't really apply. New Mr. Chideltjen has some time though.