"Himalayan Kriya Master, Yogiraj Gurunath Siddhanath shows and explains the alchemical process of parad (solidified mercury). In this same way, the human being can be transformed in an alchemical spiritual process with the steady practice of Kriya Yoga. Gurunath explains how tamed mercury also known as "Quick Silver" or "the philosophers stone" is used as an aid by Himalayan Yogis to achieve enlightenment along side their steadfast kriya sadhana. Gurunath shows the alchemical process of how mercury "eats" and produces gold, a process that has intrigued for thousands of years.
Gurunath also introduces the Hamsa Earth Peace Temple Shivling. Gift to humanity in March 2008, it weighs over one tonne and is one meter in height, the largest known akhand (unbroken) Mercury Shivling. It can be termed the elusive philosophers stone and has a distinctive spherical shape. With Gurunath's tranmissions, the Hamsa Forest Ashram is a lighthouse beacon around the world, a healing enlightenment power center for serious spiritual seekers around the world and an enduring center for Earth Peace through Self Peace."
Yeah that one provided some exotic information. Gurunath seems to be a good source for that. There is another video out on youtube. It is a testimony of one of his students. I found it quite sincere and pretty amazing.