Prehnite is a prophetic stone who is worked with when you wish to receive divine visions about yourself, others or the world.  It activates your psychic abilities and therefore is a tremendous complement to all mancy activities like tarot, pendulum and scrying.  If you wish to work with divination and mancy prehnite will give you a valuable surge of power with which you can amplify and strengthen your psychic skills.  Prehnite is a light green or pale green stone; some with dark green inclusions.  Prehnite can be cloudy or clear and can appear in a crystalline form or more of a blob-like form.