Amethyst is an extremely powerful and protective stone with a high spiritual vibration. It guards against psychic attack*, transmuting the energy into love. A natural tranquilizer, Amethyst blocks geopathic stress* and negative environmental energies. Its serenity enhances higher states of consciousness and meditation. Amethyst has strong healing and cleansing powers and enhances spiritual awareness. Traditionally, it was worn to prevent drunkenness and has a sobering effect on overindulgence and physical passions, supporting sobriety. It overcomes addictions and blockages of all kinds. Used at a higher level, Amethyst opens to another reality.
(The Crystal Bible: A Definitive Guide to Crystal, by Judy Hall.)