Pietersite 

Pietersite is referred to as "tempest stone" because of the way its whirling hues resemble a storm. Pietersite purifies the aura, bringing it back to tranquility while releasing bad energy and emotional turbulence. During meditation, pietersite is supposed to function with the body, accelerating the transition to a higher state of consciousness. It may be utilized for a shaman voyage or vision quest and is said to be a stone of vision. Pietersite is a very empowering and resolute stone that raises self-esteem.