Most crystals absorb a lot of negative energy if they are being used consistently. To vibrate at their highest capacity, your crystals need to be cleansed and charged. That is where a Selenite Charging Plate can come in handy. Selenite is unlike any other crystal. It does not need to be charged, and it will amplify the energy of all crystals set upon it. When you're drawn to a selenite charging plate, it is likely because either you or your crystals need a thorough stream of cleansing + uplifting vibrations.
When you take off your jewelry each night, place your pieces atop your Selenite charging plate overnight. Place your crystals and tumbled stones on top of it to cleanse and clear their energy.