Parad Shivlingam with Black Agate Yonibase: Parad Shivlingam with Black Agate Yonibase are very unique set. Shivling carved out of parad and yonibase carved out of natural black agate gemstone.
Legends also say that for Lord Shiva, the Hindu God,this river is especially sacred on account of its origin, and it is often called Shankari,i.e.daughter of Shankar (Lord Shiva).All the pebbles rolling on its bed are said to take the shape of his emblem with the saying,“Narmada Ke Kanker utte Sankar”(a popular saying in the Hindi belt of India), which means that'pebble stones of Narmada get a personified form of Shiva’.These lingam shaped stones (cryptocrytalline quartz),called Banalinga also called (Banashivalingas) are much sought after for daily worship.
Jyotirlingam darshan: Lord Shiva first manifested himself as a Jyotirlinga on the night of the Aridra Nakshatra, thus the special reverence for the Jyotirlinga. The Puranas vociferously sing the praises of the greatness of the Jyotirlingas. By reciting the name of this, one can eliminate all the sins. The Sadhaka becomes calm, chaste and pure. He becomes illuminated and enlightened with supreme and divine knowledge. http://www.vedicvaani.com/Jyotirlingam-darshan