Moissanite is known for its extreme brilliance, and unmatched clarity,  and is guaranteed to last a lifetime. If you are looking for an  engagement ring for the woman who wants it all, look no further than  moissanite engagement rings. Moissanite Rings  are the perfect alternative to diamonds. Moissanite is a unique,  lab-created gemstone that is more brilliant than diamond and has a  hardness of 9.25 on the Mohs scale.