The ancient crystal skulls have many stories told about them, and these primarily come from various tribes of people in South America.
Crystal skulls are used for obtaining information, to see visions of the past, present and future. You can do this by scrying, using them in crystal boards or meditation.
Hold your crystal skull in your hand in front of your heart. Ask that the crystal skull be cleared of any old programming and that it works for the light for the highest good of all. Connect to a feeling of unconditional love in your heart. Send this love and joy to the crystal.