Take out a handful of pennies. It's likely the case that they vary in patina (color) and shade, Pennies are one of the most well-known real-life uses of copper. Copper is an attractive metal for money and for other items such as jewelry because of its price and durability. However, simply touching a solid copper item can cause it to patina (also referred to as discoloring). This process can be expedited by your body's own reactions (e.g. medications, perspiration, and general body chemistry).
At Love Yanz, we prefer to use the term "patina" over discoloration because patina is a natural process that is highly desirable and sought after. In fact, some jewelers will use chemicals to create a patina effect. Love Yanz bangles include a dark lettering that is achieved by a process called oxidation that adds a dark patina to the entire piece. This is then buffed away during the final stages so that it is only left in the creases of each letter. The basic point is that while "patina" often gets a bad reputation because of a lack of understanding, it's actually controllable, reversible, and desirable in some cases!
One at-home method used to protect against copper patina upfront is to coat your jewelry piece with clear nail polish in the areas where the piece will come into contact with skin. It may seem weird, but it's effective! Be sure to let the piece dry thoroughly before wearing. Understand that just like any other prevention method, the coating will eventually wear off and will require refreshing.
Pro Tip: If you purchase a piece of jewelry from Love yanz, all jewelry comes waxed. This wax coating same the purpose as the nail polish. Adding additional layers of coating such as nail provide additional coverage from elements such as your skin, exposure to the air, and other potential chemical reactions.
If you already have a piece that requires maintenance, check out the Love Yanz Basics: How to Remove Tarnish to learn how to clean your piece and restore it to it's pre-patina state.