Moissanite Star Rhodium-Plated Drop EarringsIncludes: A matching box. 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). Style: Modern Material: 925 sterling silver, Rhodium plated, Moissanite Care: 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.