Jeweler's Brass, also known as Red Brass or Merlin's Gold is a type of brass that is higher in copper content than standard yellow brass (at approximately 85% copper) which gives it the same look and tone as 14k yellow gold. Our jeweler's brass jewelry is made of solid brass which may darken and patina over time depending on conditions, though not as quickly as copper. These pieces are polished but not lacquered, and they are very easy to clean. For some wearers, brass will leave a temporary green mark on your skin. It washes off with soap and water, and is harmless. If you have any questions about caring for jeweler's brass or wearing it, please feel free to contact us.