Lock necklace Etsy 14k Solid Gold Lock Pendant, Unique Pendant Necklace, Collapsible Auspicious Lock Pendant Necklace Padlock Lock & Key Necklaces & Jewelry Oak & Luna Lucky Pendant Necklace Set Good Luck Coin Pendant Necklace Gold Lock. Pieces: 1 piece Includes: A matching box. Material: 925 sterling silver,Zircon,Chalcedony Care instructions: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide, which causes the jewelry to deteriorate and corrode over time. Imported Product Measurements (Measurements by inches) & Size Conversion Size Chain length Extension chain length One Size 15. 7 2