Learn how to clear the energy of crystals and stones.
Most crystals and gemstones, on their own or in jewelry, will pick up negative or unwanted energies over time. They are a bit like sponges absorbing and reacting to the environment's energies. Some that don't absorb energies and thus never need clearing are citrine, kyanite, azeztulite, and Melody's Stone aka Super Seven.
Crystals and stones that are used for crystal healing or energy work should be cleared and cleansed of negative energy prior to any the work. You will also find that clearing stones makes them more cheerful and positive to have around.
Here are a number of methods that are commonly used to clear crystals and stones to restore their bright, happy, vibrant energy. Some are more complex or take longer, others are extremely simple and quick. Use whichever suits you and your crystals best. Whichever method you choose, focus on using it with intention of clearing negative and unwanted energies from the crystal.
Salt Water: While this is a popular way to clear crystals, I recommend using salt water very carefully, if at all. You need to know about your crystals to be sure that they are not porous or soft, so they won't be damaged by water. Salt water can get into the structure of some crystals and stones and cause them to break. That breakage sometimes doesn't happen immediately, but the weakened structure may break later. Some stones that don't do well in salt water are calcite, carnelian, halite, hematite, labradorite/spectrolite, lepidolite, lodestone (magnetite), mica, moldavite, opal, turquoise, ulexite, clusters of most stones, and there are surely more. When you do use salt water, do so cautiously and don't leave your crystals in it longer than absolutely necessary.
Crystal Sea Salt: Crystals can be placed in dry, coarse sea salt for up to 24 hours to clear them. They can also be stored in sea salt to keep them from picking up energies from their surroundings. In humid areas, using sea salt can sometimes cause the same problems as salt water. It can also get stuck in the crevices of clusters and eventually combine with water in the air and split the cluster.
Sunlight or Moonlight: The rays of the sun and moon are energetically very clearing and energetically cleansing, as well as energizing. Placing your stones outside where they can soak up the sunlight or moonlight for a day/night to a week is very beneficial. Do be careful though, as some the colors of some stones may fade in the sun. A few of the stones that will fade in the sun are amethyst, celestite, opal, and turquoise. If you have any doubts at all, be sure to use only moonlight cleansing.
Earth Burial: As creepy as it may sound to those of us who grew up watching horror movies, burying crystals and stones is very cleansing and healing for them. You can bury them in the Earth for 3 days to a week, either in your yard or in a flower pot. Be sure that if you bury your crystals in the yard that you mark the spot. You don't want to have to dig up half the yard to find your stones again.
Smudging: Smudging is one of my favorite methods of clearing crystals and stones of unwanted energy. It's also a much quicker way to clear crystals than any of the above methods. To smudge them, pass you stone several times through the smoke of burning cedar, sage, sweetgrass, or incense. For more details see my Q&A Blog post "How Do You Smudge A Crystal?"
Water: COOL Filtered or tap Water: For a quick clearing, you can also run your stones under cool water. Hot, very cold, or warm water is a no no because it can fracture some crystals and stones. Again, as with salt water, be sure that your crystals are not porous or soft, before putting them under the tap. Crystal clusters and geodes are two types of stones that do not do as well with water, as they may break apart and crumble. The stones mentioned as not doing well with salt water may also not do well with water.
Reiki/Seichim: Reiki or Seichim is another of my favorite methods of cleansing crystals. In a sense, it's channeling the universal life force energy to heal the crystal of negativity and unwanted energies. As a Reiki or Seichim practitioner, just treat the stone as you would any other being that needs healing, and set your intent to heal the stone of any negativity or unwanted energies.
Stone Clearing: Some stones will clear the negative or unwanted energies from other stones. Some stones that work well for this are quartz crystal clusters, amethyst clusters, carnelian, and selenite. Place the stone to be cleared on a the "clearing" stone, and leave for 24-48 hours.
Flower Water: You can also clear crystals and stones in flower water. Soak the stone or crystal in water with the petals of rose, honey suckle, orange blossoms, jasmine or others for 24 hours. Again, the same cautions apply regarding stones that don't do well in water.
Ask the Divine or Pray: This a simple ritual, but it does work wonderfully. Simply ask the Divine (God/Goddess/Universe/etc.) to clear and energetically cleanse your crystal for you. You can also simply ask the crystal to clear itself. Form your request with specific intent and ask in a meditative or prayerful frame of mind. Something like "O Great Divine, please clear all unwanted energies from this crystal for the best and highest good of all concerned. Thank you. Amen." would be a good specific request. The details should be changed to fit your own beliefs and needs.
Demagnetizing Devices: I've not tried this one, but I've heard that using a bulk eraser (like for videos, etc.) is a good method for clearing crystals. You can run the crystal over or depending on the type of device, though it, until its energy is cleared.
Third Eye Breathing: In a quiet, private place, ground yourself and start breathing slowly. Visualize yourself breathing white light in through your Third Eye chakra and back out. Hold the crystal in your hand at Third Eye level and breathe white light from your Third Eye to the crystal with the intention of clearing unwanted and negative energies. Repeat at least 3 times, more if the crystal does not feel cleared after the third time.
Sound: Use a melodic gong, Tibetan prayer bells, a bell, chanting OM to clear unwanted energies from your crystal.Hold the crystal and sound the gong, etc next to it, passing the crystal through the sound waves to clear it.
Candle Flame: While focusing your intention and verbally praying or asking for the clearing of your crystal, pass it quickly through the flame of a white candle. Be sure to move it quickly enough to prevent overheating or damage to the crystal. Repeat until the energy of the crystal feels clear.
Four Elements: In a ritual, use symbols/representatives of the Four Elements and call on them to clear your crystal one at a time while passing the crystal over or through the symbolic representation of each element. For the Five Element system, do the same but with Five Elements.
Whichever method you choose, the exact length of time needed for clearing varies according to personal taste and the state of the crystal. Trust your intuition and higher self to lead you to the best methods and lengths of time for you and the stone.
For cleaning off the dust and dirt that may get on a crystal, see my Cleaning Crystals and Stones article. For charging crystals and stones to their highest energy, see my How to Charge Crystals and Stones article.
I've experimented and found that salt water leaves a green oxidization residue on sterling silver. This twist of silver wire was in salt water for over two weeks, but the corrosion started within a day.
This twist of sterling silver wire was buried in dirt for over 2 weeks. As you can see, it lost its luster a bit, but a quick polishing will take care of that. This appears to be a good method for clearing stones that are in jewelry.
Water will eventually corrode silver, but this takes a very long time. The sterling silver wire in this photo was in tap water for over 2 weeks and has very little green oxidation. In fact you can hardly see it at all. As long as your jewelry isn't going to stay in the water a long time it's not likely to damage the jewelry metals to cleanse the stones in water unless your water has a high sulphur content or something of the kind.