Shilajit, also known as silajit, salajeet or mumijo, momia and moomiyo,"shargai", is a thick, sticky tar-like substance with a colour ranging from white to dark brown (the latter is more common), sometimes found in Caucasus mountains, Altai Mountains, and Tibet mountains and mountains of Gilgit Baltistan Pakistan.

Shilajit is a blackish-brown exudation, of variable consistency, obtained from steep rocks of different formations found in the Himalayas...

It is used in Ayurveda, the traditional Indian system of medicine. It has been reported to contain at least 85 minerals in ionic form, as well as triterpenes, humic acid and fulvic acid. A similar substance from the Caucasus Mountains, and the Altai Mountains is called mumijo (Russian).