You can charge your crystals by finding a safe place to rest your crystals and minerals, letting them bathe in Sunlight or Moonlight. (Sunlight for Masculine and Moonlight to restore feminine energies)
Burying your crystals and minerals in natural earth (dirt) or sand will help ground and balance their masculine and feminine energies.
Letting your crystals soak in sea salt/Himalayan salt, running them under purified wateror submerging the crystal in a natural body of water works best to clear the trapped negative energies.
Smudging your crystals with Sage is an incredible way to clear negative energies and to cleanse your crystals. I highly recommend saging! (Sage is a masculine energy) Sage kills airborne bacteria by 94%.
Smudging with Palo Santo clears negative and positive energy, neutralizing a crystal or object. Crystals love to be cleansed and charged in the sun, but there are Crystals you should avoid placing in Sunlight for prolonged periods of time to ensure that their color will not fade. Amethyst, Ametrine, Apophyllite Green, Aquamarine, Auralite23, Celestite, Citrine, Fluorite, Hiddenite, Kunzite, Opal, Rose Quartz, Smoky Quartz, Spirit Quartz, Super Seven Quartz, Topaz, and Turquoise.
Although running crystals and minerals under water is a great way to clear trapped negative energy, some minerals should avoid water because of their softness in terms to the Mohs scale.. to avoid damage. Desert Rose, Angelite, Azurite, Chalcopyrite, Hematite, Kyanite, Kunzite, Malachite, Selenite, and Turquoise.
Reminder (Crystals dislike Clutter): Just like cleaning your room helps declutter your mind. Crystals need to be cleaned and cared for just as much and have the same effect on your Mind, Body, and Spirit!