For any ring with copper or brass that has darker oxidation on it, the dark oxidation finish will eventually wear off, making the copper or brass the natural color of the metals. the copper and brass will oxidize naturally to a brown patina rather quickly. Similar to the way a US penny wears. Many people love the way the copper and brass brown up, as it antiques through time. However, if you love a design, but you also love the shade of color you see in the photos, and you want the shade of color to always remain, you may purchase the same design from our shop using a solid 14K rose or yellow gold core. The gold will not oxidize as copper and brass will.