I am sorry, but I am a little unclear about your question after a year and a half of what? If you mean a year and a half after the engagement was terminated, AND you were the one who called it off OR you and the other party (*a.k.a.*, your former fiance/ee) both agreed to call it off, then the other party could bring suit under *California Civil Code **? 1590*("Gifts in contemplation of marriage; recovery"). And, keep in mind that there are other causes of action (or, grounds), under which, the other party could also sue you (*e.g.*, conversion). And, given that a year and a half is less than the statute of limitations for many of the possible causes of action that would apply to this scenario, it likely would not be "legal" (to use your terminology) to sell your engagement ring after a year and a half.
Answered on Jan 09th, 2013 at 11:03 PM