To use crystals to connect with your chakra, make sure that they are first cleansed from the energies of others who may have handled them before you, and that your intention for how they will be used is set. You can clean your crystals by:
Smudging with white sage. Simply light the tip of a white sage bundle until it begins to smoke, blow out the flame, and hold your crystal in the rising smoke for a few seconds, setting the intention that you’ll be using the crystal to help you connect with your chakra. This is our favorite method because after you cleanse your crystal, you can also cleanse your body by directing the smoke toward your chakras (and the rest of your body) with your free hand.
Laying them out overnight under the moonlight to soak up the moonbeams.
Running water over them or soaking them in saltwater. When cleaning with water, use caution. Any stones that rate low on the Mohs hardness scale (a scale that helps identify mineral specimens and compares the resistance to being scratched) may get damaged or dissolve as a result.