This is naturally occurring salt crystal from the foothills of the Himalayas. The salt is collected from mines 800m below the ground. It is thought to have natural de-ionizing properties which are beneficial to health.
Negative ions restore and neutralize air quality. Negative ions can be used to treat illness and improve health. Our homes and offices are filled with electrical appliances and electronics (televisions, computers, florescent lighting, microwaves, heaters, air-conditioners, etc.). Use of such devices have been blamed for lowering our energy levels, making us feel tired, cranky, and depressed because of their emissions of positive ions. Keeping a rock salt lamp in areas where positive ions are polluting your air space will help neutralize the air you breathe. Balancing positive and negative ions also help reduce airborne infections.