Amethyst is a “stone of spirituality and contentment”.  Amethyst is an extremely powerful and protective stone with a high spiritual vibration. It guards against psychic attack, transmuting the energy into love.  Amethyst has a strong healing and cleansing power, clearing the aura and stabilizing and transmuting any dysfunctional energy. Amethyst bestows stability, strength, invigoration and perfect peace. 
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. 
Amethyst is extremely beneficial to the mind, calming or stimulating as appropriate. When used in meditation, it turns thoughts away from the mundane into tranquility and deeper understanding. It helps to maintain focus and control. It enhances the assimilation of new ideas and connects cause with effect. This stone facilitates the decision making process, bringing in common sense and spiritual insights, and putting decisions and insights into practice. 
Amethyst is “warm and cuddly” as well as regal and ruling.  It brings one the energies of serenity and composure while inciting fairness in decisions and enhancing the ability to manage any and all responsibilities.
It provides the “sense” in common sense and encourages flexibility in decisions.  It controls temperament by imparting a soothing, calming, and tranquilizing influence while clearing away unproductive and unkind vibrations.  It is also said to help business affairs to prosper.
Amethyst balances out highs and lows, promoting emotional centering. It dispels anger, rage, fear, and anxiety. Alleviating sadness and grief, it supports coming to terms with loss. Amethyst is one of the most spiritual stones, promoting love of the divine, giving insights into its true nature, and encouraging selflessness and spiritual wisdom. It opens intuition and enhances psychic gifts.
Amethyst can be used to treat hearing disorders, to strengthen the skeletal system and reinforce ones posture.  It is quite useful in the treatment of disorders of the nervous system, digestive tract, heart, stomach, skin and teeth.  It has been used to treat insomnia and to ameliorate pain from headaches.