he unique crystalline structure of Himalayan mountain salt was formed two hundred and fifty million years ago by the heat and pressure generated as the Himalayan forced itself up from the ancient sea bed between tectonic plates. The salt here has been harvested for over three thousand years and today is still valued for its quality world-wide. Natural Pink Himalayan Salt crystal night light is perfect for a soft soothing light. Perfect for a nursery, living room or bedroom.