Glass-ceramics in the SiO2-Al2O3-CaO-MgO system have been widely investigated for its various useful properties like low cost, superior mechanical strength, good chemical durability and excellent wear resistance. Diopside CaO-MgO- 2SiO2 crystalline phase generally precipitates in SiO2-Al2O3-CaO-MgO system which has desirable mechanical strength that may also be machined to some extent. Diopside (CaMgSi2O6) glassceramics are well known for their mechanical and electrical properties, i.e., high mechanical strength, low dielectric constant, high quality factor and low temperature sinterability.