Copper is an element with atomic symbol Cu. One of the few ductile metals that occurs naturally in a pure useable form. Subsequently, as early as 8000 BC, pure native copper was one of the first metals to be forged, smelted and reshaped for human application. Copper also occurs in a vast array of mineral structures. Over decades and in the presence of other elements, the copper in these minerals oxidizes to produce a variety of incredible natural colours. William Stanton uses temperature and catalysts to accelerate and manage chemical oxidation reactions in a controlled ambient environment. Generating natural oxidation colours on forged copper pieces.