The crystals reveal their secrets. . . The Witch's Apprentice: Crystals & Energies is a pocket spell book, providing everything the modern witch needs to know in order to live in harmony with nature and the elements. Learn how to choose crystals according to your needs and how to put together your own 'crystal first aid kit'. There are also tips for simple rituals to use crystals as part of your daily routine and for taking care of your crystals using different purification techniques.