Please note that pure copper does develop a patina over time when left untreated and will turn your wrist green.
That's the property of pure copper. If it does not turn your skin green, then it's not a copper or its coated.
Copper emits anti-inflammatory and antioxidant properties. The Health Benefits of Wearing Copper Modern science confirms what people around the world have known for hundreds of years. Copper is an essential nutrient, playing a vital role in keeping bones, skin, brain, blood vessels and immune system strong and healthy. Copper also has anti-bacterial properties useful in slowing the spread of illnesses.
Because copper can be absorbed through the skin, wearing copper jewelry has become a simple, popular way to reap the benefits of this lovely metal.
This copper bracelet is pure copper, uncoated, for those who believe there is health benefits to having copper next to your skin. It will tarnish on the inside first where the copper touches your wrist, and when you notice traces of tarnish coming off onto your skin, just give it (the inside) a polish. This is easy, and it will be good again for a while, leaving no mark on your skin until it needs another polish. As for the outside, a very light tarnish may come away with a jeweler's polishing cloth, thus avoiding the polish. But if you like the look of patina, then don't worry and polish if you want to.