We offer 4 types of metals on our Jewelry. 1. Gold won't tarnish and is very safe on your skin.2. Our Sterling silver options (Also known as Sterling Silver, 14K Gold over Sterling Silver or Two tone 14K Gold over Sterling Silver) are made from 925 Silver and won't tarnish and is very safe on your skin.3. Stainless steel won't tarnish and is safe on your skin.4. Our brass options (also known as Gold plated or Silver plated) are made out of copper and may tarnish when exposed to certain elements such as salts, hair treatments and other harsh chemicals. This is still a great option to buy. You will just have to take better care of it. It will last you a good amount of time. Just not as long as the 925 Silver or Gold metal options.