The metal of your jewel may lose its bright over time because of the natural chemical reaction between metal and oxygen called oxidation. But don’t worry, oxidation is just on the surface.Rubbing the metal with a lather cloth will bring back the original bright.For any additional caring, use just a few drops of silver or bronze cleaner that you find on the market. There’s a specific page about this topic with few and simple steps to follow and products that I personally recommend here.I can also realize your jewel with a special alloy with Palladium. They will don't need to polish, and they won't be affected by oxidation. If you like this idea, send me a message by using the purple cloud on the bottom right of every page on site before purchase, and I'll give you the quote and timing.