Crystal skulls, by themselves, are a mystery. There does not seem to be a definitive answer about how the crystal skulls work or produce their strange phenomena around them.
Skull carved out of solid Lavender Quartz. 5" High and weighs 5.66 lbs. - $550.00
Skull carved out of solid Rose Quartz. 5" High and weighs 6.0 lbs. - $500.00
Skull carved out of Smokey Citrine 3 1/2" High and weighs 2 lbs. - $990.00