A set of a silver 925 tennis necklace and bracelet. (Tennis Necklace) Total length: Approximately 42cm Markings: 925, J (Tennis Bracelet) Total length: Approximately 17.5cm Markings: 925 The material is likely zirconia, CZ diamond, Swarovski, or rhinestones, not diamonds. Purchased 5-6 years ago, so the silver has noticeable blackening in some areas, but there is no significant damage and it should be fine to wear. Please consider using them. Please understand that these are used items and consider accordingly.