Hello, first of all, thank you for choosing us. It does not tarnish or rust, but you need to use it under certain conditions. It does not darken unless you come into contact with chemicals such as shampoo, detergent, perfume, cologne. The gold and silver color on it is made with a set of chemicals. perfume, shampoo chlorine water etc. It loses its properties when it comes into contact with chemicals such as and it starts to discolour, so we advise not to contact with materials with chemical ingredients.