Moissanite is a gemstone born from the stars. It was first discovered in 1893 by a French scientist named Henri Moissan, who later won the Nobel Prize in Chemistry. He discovered microscopic particles of the gem that would eventually bear his name in Arizona, in a crater Moissanites touted as “colorless” can still project a yellow or grayish hue in certain lights. Here again, the larger the moissanite, the more noticeable the color and the easier it is to identify it as a simulant.