Rhodium Plated .925 Sterling Silver Black Moissanite Earrings. 6mm faceted studs with push back closures.1.50 CTW Passes the diamond tester! New without tags.Please note - pictures are enlarged to show detail. About Moissanite:Originally discovered inside the center of a meteorite, moissanite is a brilliant and durable diamond alternative. Moissanite is a naturally occurring mineral called silicon carbide, which is very rare in nature. Moissanite used in fine jewelry is almost always created in a laboratory, where silicon carbide crystals are grown under controlled conditions.Moissanite is second hardest to diamonds on the Mohs hardness scale. Based on rankings from one to 10, diamonds are a 10 and moissanite is a 9.25-9.5. The gemstone is also known for its high refractive index of 2.65, making it the most brilliant gemstone on earth!