Moissanite stones are a gorgeous and very durable diamond alternative that is made up of silicon carbide. The strength of Moissanite stones allows them to be available in a variety of cuts and set in a variety of magnificent settings. Found both in nature and able to be grown in the lab, Moissanite appears so much like a diamond it is often hard to differentiate between the two. It is no wonder it is one of the most common gemstones for engagement rings.