Moissanite is an exceptionally rare gemstone that shines brilliantly and boasts a high refractive index. It is a transparent crystal that is hard enough to withstand the rigors of everyday wear, making it the perfect choice for rings, pendants, and earrings. The crystals are naturally white in colour, but come in a wide range of other hues. Moissanite Loose Stones are loose gemstones, that look like diamonds. They are made from silicon carbide and are known for their high clarity and luster. They have a hardness of 9.25-9.3 on the Mohs scale.