Quartz. Mineral formed by Silicon and Oxygen. It can have different colours and formations depending on the temperature reached in the crystallization and the contact with different minerals or metals. Energy is absorbed, stored and regularly released by Quartz. It cleans and reinforces the body and the soul. Boosts concentration and stimulates the memory. It has been known since Prehistory, and it is used in healing processes and as a protection amulet against enemies.