Аннотация:Brief analysis of sedimentary formations' argillaceous minerals behavior has been made on various stages of sedimentogenesis, diagenesis, katagenesis and metagenesis. It is shown that each of the distinguished in the Earth crust zone is characterized by various combinations of argillaceous minerals and degree of postsedimental transformation of rocks. Argillaceous minerals and their associations in terrigenous, terrigene-carbonate formations were characterized. In specific details argillaceous minerals of early stages of sedimental- and diagenesis (partially katagenesis) were charactarized, to which most of ancient Mesozoic diamondiferous placers are usually confined, by availability in which of kimberlite indicator minerals prospecting of primary deposits of diamonds with the help of heavy concentrate-mineralogical method are performed.