Power Crystals C Grade released to commemorate Hay House released to commemorate Hay House 30th anniversary or environmental protection against electromagnetic and geopathic stress best selling occultist and crystal expert Judy Hall provides a basic primer on crystal skulls: What they are Where they are found Their role in legend and lore around the world Their uses for physical and psychic healing Also included here in this stunning introductory text is an examination of the prominent skull keepers of the past 100 years and how to use and communicate with a crystal skull including the Smithsonian and the British Museum