Prehnite is used for visualizations, prophecy, predictions, meditation, and facilitates spiritual communication through lucid dreams and is good for dream recall. It can be used for self hypnosis and auto suggestion.  It can be used to remember your dreams and you can connect to it before going to bed and ask for assistance in your dream state. Because of how it moves between the worlds Prehnite has been used as a Shaman's stone that can carry you into the sub-conscious and the earth's astral, becoming known as the "Prediction Stone", used mostly by channelers. Before contacting entities make sure you can discern positive from negative entities.
Uses - Prophecy, Inner Peace, Union of the Heart and Will, Communication with non physical beings