Refill comes with three amazing Himalayan salt rocks. Himalayan rock salt originates from northern Pakistan, in the area not far from the Himalayan mountains. It is a natural rock salt that was created when the prehistoric seas evaporated some 250 million years ago. This was long before the sub continent Indian plate moved north and crashed into Asia creating the Himalayan mountain range. The actual salt rocks vary in color from pure white to beautiful light pink to dramatic deep red, all depending on iron oxide content.