Crystal Shiva Ling

Sphatik or crystal is form of himalayan old ice which now has taken rock form..and it said in purans that

Shiviling is available in different materials and one such is, the one made of mercury – liquid metal. Mercury is known as Parad (in Hindi Paaraa). What importance does it hold? It is not mere conjecture but in actuality human mind is more often than not unsteady, and Parad too has the same property. If mercury is stabilized through different processes and a parad shivalingam made out of it, it has tremendous stabilizing effect on the person sitting next to it and meditates.

Black Stone Shivlingare considered to very auspicious as thet are made naturally in the river bed. It is believed that