It has been revealed that among pyroxenes chrome augites are dominant, and chrome diopsides are less abundant. Wide variations of the chemical composition of augites were used to recognize their xenogenous origin mainly from the lower crustal part. Chrome diopsides are thus assigned to the upper mantle rocks.
Mica is qualified as an important distinctive mineral.
Among micas besides essentially or completely xenogenous biotite and muscovite, there are phlogopites, ferriphlogopites and tetraphlogopites. Such a diversity of micas is apparently due to their different genesis and origination, in some cases, as a result of metasomatic transformation of pyroxenes, amphiboles and garnets. Decreased amounts of alumina and titanium dioxide were noted in some phlogopites, as concentrations of the total iron increased, which is indicative of favourable conditions for the evolution of both kimberlites, and lamproites.