Clear Quartz is known as the Master Healer and can really be used for any condition. It is a good crystal for meditation and strengthening spiritual connection. It is especially good for avoiding colds and flu during those winter months. It is also thought to be good for Lupus disease, M.E., concentration and decision making so would make a great study aid. Clear Quartz is an energy amplifier and raises your spiritual connection and attunes you to your spiritual purpose.