Each piece weighs around 3 kg and has been sourced from the salt mines located at the foothills of the great himalayas. It is beleived that heated salt crystal lamps are natural ion generator. They bind the negative ions with excess positive ions produced by electrical appliances and computer. When the lamps become warm, they absorb moisture and the surface crystals become damp. This builds up the ion field. Use rock salt beautiful lamps in your home office or at work to reduce fatigue. The lamp will help neutralize the electromagnetic pollution emitted by computers and office equipment. Using a salt lamp at work can improve your concentration, enhance your environment and increase your productivity. The ambient air surrounding the lamp is cleaned by the transformation cycle of hydrogen and oxygen, as well as sodium and chloride ions. The resulting purified air is helpful in the relief of asthma symptoms and upper respiratory problems. Because the salt lamps are carved fromsalt, it can melt when it encounters with water or if placed with high humidity particularly in rainy season.