Crystal sculls are used for channeling information and energy, also manifesting.
Clear quartz is a Master Healer, it includes information about all other crystals, that’s why it suits for opening and balancing all chakras (7 quartz crystals instead of chakra stones). Particularly hea for balancing the crown chakra. Good protevtion from electromagnetic radiation, good for making crystal water.
Not recommended to cleanse or charge in direct sunlight – fire hazardous.