Hmmmmm, if it were me, I don't think I could wear it. Too many associations and why wear something that could have the potential to feel sad or angry?
In fact, when I found myself in this predicament, I gave the jewellry away to a friend who could appreciate it and wear it without the association of excess baggage......
One friend who went through a particularly nasty breakup, hocked jewellry given to her by an ex, at a cash converters (pawn shop?) and then used that cash to buy herself something new which didn't have the same association attached to the object.
Yet another friend of a friend returned the jewellry to the ex. In pieces. Goodness, my friends and I sure seem that we were an angry bunch, weren't we?
I guess a woman scorned......