I don't know if anyone has heard of this old trick, but here is something to help you with fake jewlery. You know how fake jewelry loves to give us a nice green tint on our skin or give us allergic reactions, well this is a trick to help stop that from happening. Clear nail polish. All you need is a coat of clear nail polish over your jewelry. This prevents the green tinting from leaving the jewelry and any other reactions. The only thing is, you need to keep reapplying a coat as needed, the nail polish will come off eventually.