Freshwater Pearl 925 Sterling Silver NecklaceFreshwater Pearl 925 Sterling Silver Necklace Imported 925 Sterling Silver, Platinum Plated, Zircon, Freshwater Pearl Includes a matching box. Care Instructions 1. 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. 2. While wearing the pearl jewelry, avoid exposure to the sun and contact with highly volatile substances such as