The copper I use for my jewelry is natural and untreated. You can keep your handmade copper jewelry clean by occasionally washing it with warm water and mild soap. Then, dry and polish with a soft cloth. You can also use a soft cloth to gently polish your jewelry using a store bought polish.
If your copper should tarnish, as copper naturally does, you can clean your jewelry using one of the following methods to restore its shine:
Use table salt and vinegar - make a paste of salt and vinegar and gently rub into the jewelry until any dirt or tarnishing is removed. Rinse with water and polish with a soft, dry cloth.
Use salt and lemon - pour salt on half of a lemon and rub over jewelry, or pour salt and squeezed lemon juice onto jewelry and gently rub in. Rinse with water and polish with a soft, dry cloth.
To slow the tarnishing when your copper jewelry is not in use store in a container.
Your skins reaction to different metals may vary. Due to allergies or some medications you may take.