Moissanite is a gemstone that is extremely rare and expensive. It is the diamond's closest cousin and has been described as the future diamond. These beautiful stones are incredibly durable, making them ideal to be worn in jewelry. The Moissanite Diamond Jewelry stone was discovered by accident in 1893 at the French Moissan Quarry, which famed scientist and chemist Henri Moissan used to produce fluorine gas. Scientists first recognized the stone around 1910 after a diamond became loose during an experiment. Realizing the potential of this unique gemstone, scientists began observing its unique properties.