Yellow Moissanite Radiant Cut gemstoneYellow Moissanite Radiant Cut gemstone Descriptions Moissanite is a rare, naturally occurring mineral also known as silicon carbide. Moissanite was first discovered in 1893 at the site of a massive meteorite strike in Arizona. Scientists in Research Triangle Park, North Carolina later developed the thermal growing process that creates silicon carbide crystals, which are fashioned into moissanite gemstones. While diamonds are created from the