Gemstone Moissanite Ring with 925 Sterling Silver Jewelry Moissanite 925 Sterling Silver Necklace Poshmark 925 Sterling Silver Charms Pendant Necklace White Cat at 1stDibs Silver 92.5 Moissanite Necklace at 21912.00 Silver 92.5 Moissanite Necklace Set at 16261.00. Includes: No certificate of authenticity and limited warranty card with gemological research association (GRA), because a single moissanite has fewer carats (less than 0. 3 carats). Material: 925 sterling silver, 18K rose gold plated, Platinum plated, Moissanite Carat weight: 0. 5 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: Chain length: 17. 7 in Weight: 3. 3 oz (94 g)