<b>Characterization and Dielectric Study of Mihaliccik Tremolite</b> The natural tremolite Ca2Mg5Si8O22 OH 2 was obtained from Mihaliccik district of Eskisehir, Turkey 39.8787N 31.3806E . It is a part of the amphibole family of silicate minerals. All the phases were described by X ray diffraction XRD , energy dispersive spectroscopy EDXRF , Raman, and Fourier transform infrared spectroscopy FTIR . The natural tremolite specimen used in this study includes mostly 54.4 SiO2, 22.82 MgO, 15.04 CaO, and 1.45 Al2O3. The natural tremolite sample used for the present investigation was not pure. The impurity was calcite. The FTIR spectrum and the Raman spectrum were recorded for natural tremolite sample in the range of 4000 and 350 cm 1 and 4000 and 70 cm 1 at room temperature, respectively. The natural tremolite and fired tremolite samples were prepared for this investigation. Dielectric measurements were realized in the 3 kHz – 1 MHz frequency region and at the room temperature by using HP4192A LF Impedance Analyzer. The dielectric parameters of the samples were obtained the conclusions of the study were explained and given to be used for further investigations in some industrial productions. Tremolite XRD, spectroscopy, dielectric properties 749-756 Issue-1 Volume-4 Ertugrul Izci