One of the gabbroid intrusions of the Svecokarelian of central Sweden, the Kramsta gabbro, has been investigated concerning mineral compositions along an intersecting drill-core. Several cores have been drilled through the gabbro. The analysed core was considered to be representative. A cryptic layering is displayed by the clino- and orthopyroxenes, as well as the amphiboles, all revealing increase of MgO/FeO + MgO with increasing depth. The V-content of ilmenite and magnetite increases in the same way. The lamination of plagioclase suggests igneous layering in the rock body. All these observations indicate accordance between primary and present orientation in respect of ‘way up’. Further, the existing rock body seems to constitute only a subordinate part of the primary one. Igneous layering may explain the accumulation of V-rich magnetite. The cryptic layering will help to locate such layers, which have potential value as ores.