1. Cleanse crystals and gemstones.
Perhaps the most appropriate –– and certainly the most potent –– time to cleanse your collection is during the full moon. Place them where the moonlight will fall directly onto them, either outside or beneath a window.

I like to cleanse with sage as well and meditate with the stones I use the most, while holding the intentions I'd like to set clearly in my mind, for a sublime and powerful practice.