Moissanite is a near-colorless gemstone that's composed of silicon carbide. It's made to seem like diamonds, moissanite varies from diamond in both composition and in appearance. Like diamonds, moissanites are available in a variety of different cuts. You can find round, oval, pear, cushion, princess and radiant cut moissanites. The most popular cut for moissanites is the round brilliant cut. Like with a diamond, the round brilliant cut offers the greatest brilliance and fire. This means that the stone will sparkle when it’s exposed to bright light, which enters into the stone and bounces off its facets in different directions. Generally, moissanites look the best in cuts that hide color and emphasize the stone’s brilliance, such as the princess cut (for moissanites, this shape is often referred to as the “square cut”), as well as the oval cut, radiant cut and marquise cut.