Apart from knowing about the priceless importance of the Shivalinga, it is also vital to gain factual knowledge about it. Ujjain, in India was the place where the world’s largest mercury Shivalinga was created. A formation of a 1500 kilogram mercury, (Parad) Shivalinga, which is the largest of its kind in Sanatan Dharma (Hinduism) was completed by Sidhha Ashram and Acharya Mahamandaleshwara Swami Nardanand Paramahansa Maharaj. The piousness and purity of this Siddha Parad Shivalinga can be imagined by the fact that the mere chance of worshipping and touching this Parad Shivalinga is attributed to one’s holiness and good karmas of not only this life but also of the past.
The Parad (Mercury) is the most magnificent and valuable of all metals as per Hindu Scriptures. A claim of a particular sloka from the Rasyog Chintamani states that:
“Sphatik is better than paashan, padmaraaj than sphatik, Kashmir Jewel, Pushparaaj i.e., lahasunia than Kasmir jewel, panna than lahasunia, neelam than panna, godanti or gomed, mauktik than vidrum, silver than diamond, gold than silver, diamond than gold and parad (mercury) is yet better than diamond.”
Hence, Parad is considered to be above all the jewels and metals and if the Lingam of Lord Shiva is made of a such valued metal like Parad, then undoubtedly its power is unmatchable.
THE IMPORTANCE OF THE PARAD SHIVALINGA ACCORDING TO TANTRA
There are certain kind of waves emitted from almost all the metals and sub – metals found on Earth. This theory applies to Parad as well. Though it emits its own waves, Parad is believed to be the most unsteady of all metals and impulsive in nature. Similar, to this is a man’s mind, there is no way that a man finds end to his curiosity. His mind is ever wandering from one aspect to another and tends to lack focus. Therefore, in this sense, the nature of Parad and a man’s mind is quite identical. If there is a sense of balance brought about in Parad by destructing its unstability, its waves will coagulate and this will also cause to leave its impression on a man’s mind when he decides to bring this precious metal home. To increase the concentration level of the mind, it is vital that one starts the process of meditation beside a Parad Shivaling. This is the reason why a condensed form of Parad is utmost importance as it elevates the concentration level of the mind to unimagined parameters.
Google has chosen Shaligram Shala ( shaligram.com) as the world's first 5 star 
rated Rudraksha supplying Company 
Largest Mercury Shivalinga 
