Pure and Mg2+ doped ZTS, a semiorganic single crystal has been grown by slow evaporation solution growth technique at room temperature. The growth of pure and Mg2+ doped ZTS were confirmed by single crystal X-ray diffraction analysis. Result of indentation –induced hardness testing is presented. The Vicker’s Micro hardness of the material in the load range 25 - 200g were pure (111.89 – 210.732) and Mg2+ doped ZTS (96.52 – 172. 92) Kg/mm2. The values of elastic stiffness constant, fracture mechanics, brittleness index and yield strength have also been calculated. The dielectric measurements of the crystal in the frequency range 1 KHz – 1MHz were investigated. The activation energy of electrical process was also calculated and reported