In Hinduism, Rasalingam or Parad Lingam is a Lingam, the symbol of the god Shiva, made of mercury. Tamil Siddhas carved Shiva Lingam from solidified mercury. The process of solidification of mercury is the secret process enunciated by Tamil Siddhas. In Tamil, mercury is called Pada-rasam and the Shiva Lingam made using pada-rasam is called Rasalingam. In Sanskrit, mercury is called Parad and the Shiva Lingam made using parad is called Parad Lingam. Rasalingams or Parad Lingams are consecrated in Hindu Shiva temples, Ashrams and other places of worships.
Parad Gutika is an excellent tool for a siddha kundalini sadhana. Parad Bead when worn by students increases their grasping and concentration power., Parad (Mercury) found in nature is having various natural and Inherent impurities and contaminations. However, Parad (Mercury) Gutikas by G.S Rana Parad Shivling (Complete with 8 Samkaras or Asht-Sanskar or 8 steps of purification) are purified, effective and powerful., Parad Gutika is rare and pure mercury bead. Ancient Vedic Scriptures assert Parad as the pure, powerful and auspicious metal that has both medical and spiritual importance. Yogis and Astrologers however, possess deep insight of Parad (Mercury) products and the experiential knowledge of its effects on human body and alchemy.