Some people usually discard their copper jewelry whenever it turn color. If you love your jewelry and not sure how to clean it. Do not discard before you try this tip...
Use tomato ketchup to clean your copper jewelry.
Just use a damp cotton ball, damp paper towel or damp old tee shirt rub onto jewelry until clean. Rinse out in cool water, and wipe and shine with old tee shirt.
You would be surprise to see how beautiful your copper jewelry looks once clean. So don't throw away your copper jewelry if you like it.