Selenite derives from the Greek moon goddess, and means moonlike-glow. It has a very fine and high vibration, induces clarity of mind and accesses angelic consciousness. I call Selenite the fiber optic cable of the crystal world, for its ability to be a conduit of high vibration light frequencies. Satin Spar is often sold as Selenite, but that is a geological term, Satin Spar is a bit different as it grows in columns. Selenite forms more like ice sheets of paper on top of one another. Selenite is the only crystal term for Gypsum. Chalk, Plaster of Paris, Alabaster and Satin Spar are also forms of Gypsum.