I have a few other suggestions, depending on what sort of jealousy we are dealing with.
If the jealousy is coming from another person and is having a negative impact on your life, then look into the stones that protect from negative enrgy like Black tourmaline ad Hematite, among others.
If the jealousy is an internal issue that you are being proactive about changing, so your thoughts and emotions will become more positive and constructive, then Rose Quartz is a stone that boosts both love of self and love of others.
Come to think of it, I'd add Rose Quartz to BOTH situations. Even if we are the object of someone else's jealous actions and behavior, we want to be able to react in a constructive way, not meeting hostility with hostility. So bringing the energies of love into ourselves, something Rose Quartz can assist with, will help us respond to others in a way that will help improve matters (or at least, not cause matters to deteriorate).
Edited to add: if the jealousy is the result of an extremely possessive romantic partner, it is going to take more than stones to deal with the issue. It's going to take some serious action and interaction with your partner, and possibly also a re-evaluation of whether the relationship is boosting you up or bringing you down. That's a judgment call that's best made by you, as you are the person who is living the situation.