The rock salt is estimated to have formed hundreds of millions of years ago when ancient bodies of water evaporated; it is mostly mined from the Khewra Salt Mine in the foothills of the Salt Range in Jhelum, in the Pakistani province of Punjab. Gangji Himalayan Rock salt Products consist of 80 plus minerals which makes them healthier than the common table salt. Premium Quality Himalayan Pink Rock Salt Lumps per kg 16 rupees 100% pure Himalayan Pink Rock Lumps Salt packed in 50 kg's Bag.