Moissanite is a diamond simulant made of silicon carbide. A moissanite simulant is a stone that has a similar appearance to a diamond, but is not a real diamond. It is very difficult to tell apart a diamond & moissanite, making moissanite a common diamond alternative. Moissanite engagement rings are an alternative to the traditional, more popular diamond engagement rings. Item Type: Wedding & Engagement Ring Setting Type: Prong Setting Main Stone: Moissanite Stone Size: 1.00 ct - 3.00 carat DEF, GH color VS1 Clarity moissanite, guranteed moissanite 1: Moissanite As Brilliant As Genuine Diamond Guarantee 2: Moissanite As Lasting As Genuine Diamond Guarantee 3: Moissanite Test Positive by Thermal Diamond Testers Guarantee 4: Genuine sterling silver. Every jewelry comes with a certificate of authenticity/warranty card as well as a beautiful gift box.