By conducting chemical studies by XRF method and mineralogy by XRD method, the main minerals include orthoclase and albite in the composition of this mineral. Examining the physical properties shows that shirkij is suitable and its color is white and light gray after baking, and since sedic feldspar is potassic, it is recommended to use it in porcelain ceramic factories instead of sedic feldspar because The K2O present in this feldspar has a wide firing range and reduces the distortion in the body