【How-to】Does vinegar hurt gold - Howto.org

To make a simple cleaning paste, first, mix together 3 parts baking soda and one part water. Use a cotton swab or sponge to apply the paste to the jewelry. Once it’s coated, soak the jewelry in a cup of vinegar for 5 minutes. Then, rinse it under warm running water, which should remove any dirt or grime.