Moonlight and Sunlight: When and How Full moonlight is generally considered by most crystal communities to carry a cleansing quality. The Crystal Bible by Judy Hall describes how crystals are left out in moonlight to charge and purify; however, different moon phases have been identified to produce different results (Hall, 2003). Sunlight might cleanse but is cautioned against in light-sensitive crystals like amethyst or rose quartz.
Water Cleansing: Precautions and Techniques Running water from streams or the tap may cleanse negative energy from your crystals. However, it is advised by Love Is In The Earth by Melody not to use water as a means of cleaning those crystals that will dissolve or rust, like selenite or pyrite (Melody, 1995).
Earth: It Is All About Grounding Your Crystals Burying your crystals in the earth brings them back to their natural environment and simply recharges them with Mother Earth's grounding energy. This is an excellent method, especially for really grounding stones like hematite or smoky quartz.