Main material: stainless steel, gold plating, enamel. Necklace length: 45 cm Our jewelry is waterproof and hypoallergenic. The plating is long lasting and does not tarnish Mass: 9 g Intensity is top class stainless steel jewelry with three layers of 18 carat gold plating. It is a perfect quality jewelry, which doesn't tarnish and make our clients happy for a long time. Intensity jewelry is tested under the burning rays of the sun and in salty water of the Indian ocean. Truly waterproof. Fully hypoallergenic.