Colorless, white, cream, peach,
Good, but well-developed cleavage
Albite crystals, Crete, Greece
(K, Na) AlSi3O8
Moonstone is a variety of albite feldspar, which is a sodium aluminum silicate. Moonstones can occur colorless,white,blue white,and pale shades of peach and apricot. The rarest and most expensive will be colorless with a floating blue color that seems to hover above the stone. This phenomenon is termed adularescence. In India it was believed that moonstones placed in the mouth during a full moon would allow you to correctly envision the future. Until the 19th century, moonstones were thought to make people invisible, allowing only their spirits to wander about. A variation of that belief still persists today. It's been claimed that moonstone can lead to psychic immortality because it fortifies the spirit to stand alone from the body.