Will a copper ring turn my finger green?
I get this question a lot of my answer is, most likely and/or yes. Each person's skin reacts to copper in different ways. For most people it will turn your skin green when worn but for some it doesn't. There is no way to know if it will happen to you other then by wearing a copper ring. If your skin does have a reaction to the copper the green mark will usually disappear overnight (if the ring is removed) or will easily wash away with soap and water.
If you want to try to prevent the ring from turning your finger green you can apply clear nail polish to the inside of the ring. The nail polish coating will prevent the ring's metal alloys from coming in contact with your skin and prevent your finger from turning green. The clear polish will eventually wear off and when it does just add another application of the nail polish.