Blue Zone Planet | Moissanite Stud EarringsDETAILS: Each moissanite jewelry above 0. 3 carat is accompanied by a Certificate of Authenticity and a Limited Warranty Card with Gemological Research Association (GRA). Picture style: Studio Features: Rhinestone, each earring has 0. 5 ct moissanite, the total is 1 ct Material: 925 sterling silver, moissanite Care: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide. Imported Product