A word on brass and sterling silver metals:

To stay environmental conscious we don’t use any chemical lacquer or sealant on our jewelry. There is a natural patina (darkening/antiquing) of the metal that occurs over time. Some really enjoy the beauty of this natural process, and others prefer their jewelry to stay sparkly golden or silver. If you are the latter, please use a polishing cloth after each use, place jewelry in sealed bag and avoid prolonged exposures to water or moisture.
For brass and copper metals you can also clean your jewelry in ketchup. Apply ketchup to jewelry with a clean cloth, rinse in warm water and dry thoroughly. 
Everyone's body chemistry and reaction to metals are different, beautifully so. Because of this we unfortunately can't predict your own body’s reactions, but we do make our jewelry to last. If you ever have any questions or concerns, please reach out to us!
All our brass is Jeweler's Brass aka Nu Gold aka Red Brass which is the most golden and commonly used brass for jewelry specifically. It is an alloy of 85% copper and 15% zinc and is often used interchangeably with Bronze.