Shiva
What Do The Markings On The Shiva Lingams Mean?
The “Siddhanta Sekhara” states that the Narmada Shiva Lingams or Bana Lingas picked up from the Holy River Narmada have been worshipped by enlightened beings, especially by the Guardian Deities (Loka Pala). The Sacred Stones are still said to contain the impression of such worship over million of years.
There are Narmada Lingas carrying the different marks and characteristic of these Guardian Dieties:
(1) Conch Shell mark on top (Samkhabha Mastaka) indicates it has been worshipped by Lord Maha Vishnu, the Protector of the Cosmos.
Tags: 
Simple things that we do have a great effect on the atmosphere. By putting certain materials such as medicinal herbs for example into specially prepared fires accompanied by certain word combinations, it is possible to remove toxic conditions from the atmosphere, thereby healing and purifying it. That healing effect is then passed on to all life-forms which are sustained by that atmosphere. This is 