Used only once. I'm selling it because I have too many similar necklaces. It can be used by people with metal allergies. It is also resistant to sweat and water, so you can wear it without worry in everyday life, at the pool, or at the beach. It will make you fashionable just by adding it to your outfit. Please do not purchase if you are concerned about minor details as it is stored at home by a private seller. Necklace Black Shell Two-Layer Necklace Women's Chain 47cm Hawaiian Surgical Stainless Steel Stainless Silver Gold Metal Allergy Compatible Necklace Nickel Free Accessory k18 Finish