In once process the raw shilajit is completely mixed with water this solution is subjected to series of filtration process to remove those components that are water insoluble. These are generally considered as impurities like grains of soil etc, This shilajit solution is then concentrated by heating it in high temperature are merely exposing it to sunlight – the way salt is extracted from sea water. The creamy thick layer of shilajit that is so formed is skimmed several times to get pure shilajit. In Indian ayurvedic medical system this pure shilajit paste is fortified with several beneficial herbs like tulsi, amla (emblica) etc. to enhance its medicinal properties. In this process there is a major deficiency that has to be mentioned. Shilajit contains many vital metallo organic compounds that get filtered out during the filtration process and skimming.

In the second method of purification of shilajit the raw shilajit is subjected to light washings. This removes the impurities. Then neutral salts and citric acid is added in various proportions. This citric acid salt solution carries away the vital organo metallic compounds in shilajit. This is not removed during filtration or skimming process but is retained in final shilajit product. Nowadays the purification process of shilajit has become more complex with series of steps. Advance chemical engineering techniques of vacuum filtration, freeze drying and osmosis are used to enhance the concentration of shilajit, organo –mineral compounds and fulvic acid.