ALL chakras.  This crystal is used for astral travel and to help us understand the lessons to be learned in this incarnation. Promotes physical, mental, and emotional stability. This crystal is good for seeking out information important to our growth. It can be used to promote mental and emotional healing and wonderful for centering oneself.  Some like to use the Faden crystal to cleanse and stimulate the aura.  I feel this is an important crystalline healing tool for us all!  This is from Kazakhstan.