Chiastolite, as you can gather from its name, can help one be more pure of thought and modest. If you are one who feels they have become too boastful or braggadocios, Chiastolite may be good for you. It can also bestow strength, power, and perseverance, and can be extremely calming. It is considered by many to be a strong protection against negative energy as it deflects it rather than absorbing it (like other protective stones ten to do). It was traditionally used to ward off curses.