Clear Quartz Skulls

Clear Quartz is a universally beneficial crystal because it absorbs energy (positive or negative) and amplifies it to its maximum potential before releasing it back into the Universe. It's physical attributes are associated with strengthening the immune system. This is a great stone if you struggle with concentration or suffer from memory loss.
 
Clear quartz is ideal for scrying and assists with reaching deeper meditative states when gazed at for extended periods of time.