Translucent Selenite has a very fine vibration that allows for great clarity of mind. It enables one to open the crown chakra and access the angelic realms. Psychic work is enhanced when each person holds a piece of Selenite. This is an ancient stone and I would call it one of the most powerful crystals found.
It helps in all meditation and spiritual work.
Important: Since I posted this, I have recommended this as a powerful healing stone; specifically suggested to carry this on person while undergoing radiation treatments. I have been told from many sources that this stone has kept them from being 'burned' through the radiation process.