What are cleansing and charging and why are they necessary?
Cleansing a crystal is basically energetic washing. Charging is what you might think (for example charging a battery).
CLEANSING YOUR CRYSTAL
Let’s begin by discussing cleansing. You will need to cleanse your crystal friend of previous energy or experiences it may have encountered. This applies to crystals you have been working with as well as crystals new to your home. Crystals are empathic by nature, and pick up energies in their environment even if you aren't actively working with them. If the vibrations in the environment are low, the vibrations of the crystal will get all wicky-wacky. Sometimes the crystal will feel “full” or “sticky” energetically. You will need to cleanse your crystal friend of any possible negativity absorbed on your behalf.
When would you need to cleanse a crystal?