18K stainless steel, this necklace is designed to be tarnish-free, the tiny heart and rhinestone heart design features a delicate combination of a tiny heart and a sparkling rhinestone heart, offering a subtle yet elegant touch of romance. Hypoallergenic properties, making it suitable for individuals with sensitive skin or metal allergies. Product Details: length: 16" ext: 2" ext clasp: Lobster Claw Metal finish: Stainless Steel 18K Gold product: Lead & Nickel Compliant anti-tarnish: Tarnish Free, Non-Tarnish Real Gold Dipped Necklace Stainless Steel Necklace Hypoallergenic Necklace Tarnish-Free Necklace Non-Tarnish Necklace Waterproof Necklace Water Resistant Necklace Sweatproof Jewelry Fade Resistant Necklace Anti-oxidation PVD coated