Hello, our products in the brass category are gold plated. Gold-plated brass increases the durability of the products against water. As long as the perfume style is kept away from chemical ingredients products, the product coating will not be damaged. Therefore, there is no darkening or any deterioration throughout the product. If your skin is allergic, it may affect the coating on the product over time, which we encounter at a very low rate. We would like to inform you that we have a 90%+ regular customer and we keep getting feedback that they are happy with our gold plated brass products. We wish you happy shopping. Trendy Boutique