Banded Amethyst: ~ is a stone all spell casters have and wear as it increases psychic gifts. Amethyst is a calming stone so is excellent to use if you suffer from insomnia. Keep it under your pillow to sleep better and to remember your dreams. To get an answer to a question using a crystal ball, place five amethyst stones equal distance from each other around a crystal ball, light three jasmine candles and relax and the answer will come.