They are a traditional symbol of the occult and hidden wisdom, and much more. Some of their uses include:
Decoration with a purpose
Crystal Ball Gazing
The amethyst symbolizes piety, humility, sincerity and spiritual wisdom. It is thought the amethyst is the perfect stone to symbolize The Age of Aquarius. Amethyst has long been used to open the spiritual and psychic centers, and as an aid in meditation.