If you own crystals you probably know they need to be energetically cleaned and charged regularly.
Charge your crystals in the full moon to help them get their energy back to the fullest. Consistent charging will keep the energy of the crystals focused on you for health and positive energy. The method of energetically cleaning the crystals that applies to ALL crystals is with the lunar energy of the full moon.
Regardless if you can see the Moon or not, the energy is still there and is still affecting us and the planet. Place it somewhere in your home where it will be in the moonlight for as long as possible, overnight if you can. Once you charge the Crystal for your use, it is best not to let anyone else handle it as it will also absorb energies from other people reducing the benefits to you.