Sun and moon Placing stones in Sunlight or Moonlight is also good for clearing and charging them .Some stones are faded or otherwise distressed by direct sunlight. Some turquoise may fade I have also heard that Realgar and pyrope can dissolve in air rather than sunlight. Running water Running water works well for clearing stones that are not harmed by water . A spring or stream or the ocean waves is best though you must be careful not to lose your stones to the ocean or river. Holding crystals under the tap will do in an emergency .
Some people like to leave theirstones out during rainstorms too.
Many people also bathe with their crystals which not only clears and charges the stones it is very refreshing and healing for the bather as well. Gentler and slower methods include immersing the stones in rose petals or lavender petals or sage, thyme or Rosemary leaves or in feathers or charged sand just putting the stone on a sacred altar or in a place with healing energies will also work over time. There are angels and Deva and other spiritual beings who can and will clear crystals when you ask them learning to connect with your high self and Companion Angel will help you learn to work with the stone people in a depper way. Most of what determines whether these methods work for you is your belief system and your intention . Any of these methods will work it is up to you to find those that feel most effective to you.