Black tourmaline protects against harmful environmental effects (computer, X-ray radiation, etc.), vampirism, negative alien energy, magic. It neutralizes all the negative energy of the environment while purifying the human energy field. Very suitable for hyperactive children and adults. Sherl grounds very well, prevents you from flying in the shadows, balances the attitude between spirit and matter, increases awareness, rationality, patience, endurance, self-discipline, strengthens the "inner spine", teaches you to accept your mistakes and analyze them. Improves clarity of thoughts, concentration, logic, intellectual abilities. Promotes self-control, emotional stability, calms anger, jealousy, revenge, hatred, fears and other negative emotions. Also useful in times of stress and heavy loads.