The Oxidized Copper Bars is the final oxidation stage of the Copper Bars, displaying a fully aged teal surface with deep green accents from complete weathering. It serves as a decorative and semi-transparent block ideal for railings, cages, and architectural details, functioning identically to the previous oxidation stages. Like iron bars, it connects seamlessly to other bars, solid blocks, and fences, providing structural flexibility and visual depth.

The Oxidized Copper Bars is obtained when Weathered Copper Bars reach full oxidation over time or by using one directly in creative mode. Players can preserve its patinated appearance by applying Honeycomb to create a Waxed Oxidized Copper Bars, preventing further change, or use an axe to scrape it back to an earlier state. With a hardness of 5 and a blast resistance of 6, the Oxidized Copper Bars offers a durable, fully oxidized copper aesthetic that adds a timeless, weathered charm to any build.