The chemical composition and density related properties of the volcanic rock samples (granite and diorite) taken from the Shewa-Shahbaz Garhi volcanic complex near Mardan, Pakistan, have been measured at room temperature. ASTM standard methods have been applied in the investigation of such parameters as density, specific gravity, and porosity. Thermal properties of these samples are studied as a function of temperature, in the range (253 to 333) K, including thermal conductivity, thermal diffusivity, and heat capacity per unit volume.