Crystals should be treated with care. Many are fragile and/or water-soluble and some, such as amethyst, can fade in direct sunlight. When not in use it is a good idea to wrap your crystals in silk or velvet to protect them and to stop them from absorbing foreign vibrations.
When you receive your crystal it will have been around for many years. It may have been handled by many different people and might have absorbed some of their negative vibrations.
It is important, therefore, to spend a little time cleansing your crystal. There are several ways to do this.
Putting your crystal in the ground overnight clears your crystal of any negative energy. Remember to mark the spot well.
Most crystals can be held under running water, preferably naturally running water, but if this is not possible a running tap will do. Imagine a waterfall falling over your crystal until you feel that all the negative energies have been washed away. Please make sure that your crystal is not water-soluble before cleansing in this way.
A clue to the water solubility of a crystal can be found in it's name. Most water-soluble crystals end in "ite", such as fluorite, calcite, angelite and sodalite. Lapis Lazuli is also water-soluble.
Some crystals such as clear quartz or carnelian have the ability to cleanse other crystals. You can place a small crystal on top of a Quartz Cluster and leave it overnight or keep a Carnelian in a bag of other crystals. This is an extremely useful method for delicate crystals but the cleansing crystals may need cleansing themselves afterwards.
The vibrations of a pure sound can be used to cleanse a stone. You can use a bell, gong or turning fork.
Crystals can also be cleansed using the pure sound and vibration of Tibetan Cymbals. Holding the cymbals over a group of crystals and bringing them together to make a sound, makes it possible to cleanse several crystals at once (see the picture below).
Both moonlight and sunlight can be used to cleanse your crystals. However, sunlight can fade some crystals, whereas moonlight is a powerful safe cleanser.
Cleansing can and should be done on a regular basis. If your crystal is looking dull it may be because it has picked up and absorbed negative energy from the surrounding environment. Try not to let anyone touch your crystal, even though they may be full of good intentions. If your crystal has been handled by someone else then cleanse it to clear any absorbed negative energy.
Other ways to cleanse crystals can be found in Crystal Books.