The Vic occurrence area is underlain by high grade metamorphic rocks of the Precambrian-Paleozoic(?) Shuswap Metamorphic Complex consisting of gneisses and schists with interlayers of quartzite, marble and calcsilicate rocks. Narrow lenses of pegmatite occur along bedding planes and as dikes along joints and faults. Fine grained felsic to mafic dikes occur in northwest trending, late fractures.

Abundant pyrrhotite, minor pyrite and traces of chalcopyrite occur along the margins of marble beds and as lenses in mafic gneisses.