Lifelong Journey 1 Carat Moissanite Heart RingThis is simply one of our favorites that every woman should have. Beautiful heart sterling silver moissanite ring. Care: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide. Includes matching box and bag. Every piece of jewelry containing a single moissanite over 0. 3 carats comes with a certificate of authenticity and a limited warranty card with gemological research association (gra).