Shivling or Shiva Linga, in the Hindu scripture of Shiv Purana has been described as beginning less and endless cosmic pillar of the fire, is originally the cause of all the causes. It means it never has any beginning or ending. An oval shape structure resembling the whole Universe and its bottom resembling the base of Supreme Power holds the entire Universe.
The Earthly phallic image of Shiva is the most exceptional of all such images of Shiva. Many Brahmins have accomplished great things by worshipping it. The phallic emblem of Shiva made of precious gems was considered the best in the Karta age; of pure gold in the Dwapara; of mercury in the Treta and of Earth in the Kali age. Among the eight cosmic bodies of Shiva, the earthen body is the finest.