This diploma thesis describe mineralogical study quartz and calcite veins, that appear near Borinka in borinka unity in korenecke strata, which is compouse of carbonate. In this locality appear quartz variety, called marmarosh diamond, that we can find in the quartz – calcite veins. Task of this diploma thesis is characterization of fluid, identify minerals and their chemical composition and consider an availability of quartz and calcite for gemological intent. Main minerals in this locality are yellow and white calcite, white, gray quartz and cristal. On the quartz and calcite veins we did find dolomite and hydrotermal albite. We have results from fluids inclusions from white quartz. The results of averaged salinity is 1,42 váh. % NaCl and averaged density is 0,96 v g/cm3. In white calcite we did find afforce of magnesium. Calcite from this locality is not adequate for gemological intent. For gemological intent si adequate cristal and marmarosh diamond, because of their scarsity of fluids inclusions, fissured and good gemological manipulation.