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The effect of ferromagnetic impurities in electromagnetic based shungite absorbers is studied. The presence of the particles magnetic powder in composite structure influences on attenuation and reflection characteristics of shielding material has been established. It is found that exact quantity of magnetic inclusions in relation to the shungite powder are principal for reflection coefficient and has effect on electromagnetic radiation attenuation. The compound with powders of shungite and nickel-zinc ferrite in different percentages has investigated. The dependence of the shielding characteristics of the composite is shown. The use of these composite materials for creation of electromagnetic shielding constructions are considered.