Why Does Gold Discolor Fingers?
Your may think that faulty manufacturing or underkarating might be the problem when a ring “turns,” blackening or discoloring the skin and clothing, or the jewelry itself. However, that is not the case. The most common reason is metallic abrasion, caused by makeup on skin or clothing. Cosmetics often contain compounds harder than the jewelry itself, which wear or rub off very tiny particles. Very finely divided metal always appears black rather than metallic, so it looks like a jet-black dust. When this dust comes into contact with absorbent surfaces such as skin or clothing, it sticks, forming a black smudge. To prevent this, you should try switching cosmetics. If this is not possible, we recommend that you remove rings and other jewelry while applying them, and clean skin areas in contact with jewelry with soap and water. Another cause is actual corrosion of the metals. Gold itself does not corrode, but its primary alloys of silver or copper will do so—forming very dark chemical comp
