Yes, there is. Take the rytal and hold it in your left hand (or right hand if you are a lefty). With your other hand opened and flat, make a cutting motion over the crystal, like you are cutting off layers of its energy field. As you make each cut, exhale slightly and intend to remove any energies in the crystal. (Remember, energy follows the intention and thought.)Make the cutting motion 3 times. Then, place your hand over the crystal. Gather energy (I usually draw in white energy from above, but some people do it differently)and allow it to flow into the crystal. Do this for several miniutes. Repeat if necessary. This works to both cleanse and charge the crystal.
You can use this on any object. If it is too big to hold in your hand, imagine that a miniture of the object is in your hand, and do the same thing. One iimportant note: do NOT do this with a living being. Cutting off energy layers from someone or something else is not good to its health.