NOTE; 3 IN HAS USB PLUG 6IN REG OUTLET. Himalayan salt is rock salt is from the Punjab region of Pakistan. It is mined at the Khewra Salt Mine in Khewra, Jhelum District, Punjab, which is situated in the foothills of the Salt Range hill system in the Punjab province of the Indo-Gangetic Plain.Colored with natural minerals, such as iron, these lamps are wonderful examples of the natural wonders that can be found within the earth. Each lamp is created with a large piece of Himalayan rock salt that has had its core hollowed out, and has been fastened to a sturdy wooden base. This allows for the small light that comes with it to be placed within the piece of ote salt, creating a warm, pink glow that is great for creating a soothing atmosphere in whatever room it is placed. Further, as these lamps heat up it is believed that they create healing negative ions, which are believed to help balance your electromagnetic field, purify the air, and generally help create a sense of serenity. Each also comes with a light bulb and cord that can be plugged into any standard U.S. socket. weighs upward of 5-8 lb. CALL FOR QUANITY PRICING OF 6 OR MORE Note: If you order lamps you will recieve a separate bill for additional $5.00 for over weight shipping.