These salt crystal lamps are made from salt crystal rocks formed 100's of millions of years ago in the foothills of the Himalayas. The salt lamps are carefully crafted by hand to retain the unique, beautiful natural shape of the rock. The crystal is said to naturally ionise the air and the glow beautifies any room. Its hydroscopic properties it is said may help reduce airborne pollutants thus helping asthma and allergy sufferers. Positive ions are blamed for causing all sorts of illnesses, allergies and headaches, tiredness, stress, insomnia, loss of memory, accelerated aging, lack of concentration and a lower immune defence system. Placing a lamp around computers and in bedrooms have known to help the users with increase in concentration and tiredness and allergies and increase alertness. Lamps are used for enhancing moods and for colour therapy too. Himalayan salt lamps and tea lights are hygroscopic, they draw in moisture from the air due to their mineral make up and should not be situated in any place subject to high humidity or water. Should the lamp become wet, gentle warming will re-dry the salt crystals to their normal state. Switching on the bulb or lighting the candle should be sufficient but care must be taken to ensure that the electric fittings are completely dry. It is suggested to use the lamp more often than not to avoid this happening. Brand new Approx height 20-25cm 5-7kg Wooden base, bulb and cable provided Price: 230RMB and 450RMB for two (non-negotiable) Pick up from my place close to Dongzhimen subway station (subway line 2 and line 13)