Shilajeet is obtained from rocks in the Himalayan region. It is a form of mineral that drips from the cracks of the rocks during hot weather. It is decomposition of the plant matter in the rocks centuries before. The bio-transformed plant matter is extruded from the rocks by geothermal pressures. It is collected in raw form for further purification. Shilajeet is the most important drug of Ayurvedic medicine systems. In the raw form it is a bituminous substance, which is a compact mass of vegetable organic matter composed of dark red gummy matrix. It is bitter in taste.