Quartz stone has three grades, which are mainly divided into three grades: A, B and C. The physical and mechanical properties of Grade B and C, such as pollution resistance, acid and alkali resistance and wear resistance, have not all reached the standard requirements, so Grade B and C quartz stone cannot be used for indoor decoration. Only Grade A can be used for normal indoor decoration, and it has good wear resistance, scratch resistance, heat resistance, permeability resistance and acid and alkali resistance, so it is a good decorative material.