Crystals, gems, and minerals may be charged with energy to serve a specific purpose. This medicine lends power to the stone, and tells the spirit in the stone what you expect of it. Stones may be charged for a variety of reasons-vitality, love, good health, prosperity, creativity, etc. However, in my experience, it is always best to first ask the stone spirit what it may be used for and proceed from there, rather than tell it what to do. If this doesn't work for you, use your intuition or refer to the properties listed in the crystal encyclopedia in chapter 8 to see how you may best work with a particular stone. Also, see the section titled "The Planets" in chapter 1 or ‚ÄúThe Seven Spirit Energy Centers in chapter 4, for further information regarding luminary and planetary energies.