Narmada Stone is also known as Narmadeshwar Shivalinga the sacred symbol of Lord Shiva, which provides great spiritual relevance in Hinduism. Narmada Stone Shivling is naturally formed along the Narmada River and is considered self-manifested (Swayambhu). It is believed that the strong vibrations of the holy Narmada River are preserved in these Shivalings. Worshiping a Narmada Shivlin... https://vedicvaani.com/deity-idols-and-pictures/shivling/narmada-shivling