Black Asphaltum, Shilajit or salajeet in Urdu is a rare and expensive herb which is used as a treatment from thousands years, especially in Indian Ayurvedic treatments.
It has many benefits such as it stabilizes your mood and ends the anxiety. It is rich in antioxidants such as lipid peroxidation, which prevents the free radicals. It is also known for its antibacterial benefits and immune stimulator.
But these benefits are associated with original shilajit and not the fake that are available in the market and which are being widely sold. To know that the Salajeet you bought is original or not is not a difficult task.
Salajeet is soluble in water 98%-100%, so take a glass of water at salajeet and stir the cup let it for 5 minutes. If it is completely mixed then it is pure, then drink it and try to touch your tongue in your mouth. If there are many particles it means its low grade salajeet.