The influence of Li2O-content on the properties of standard triaxial porcelains was investigated. Two series of porcelain formulations were produced. The first one comprised seven model formulations with increasing amount of Li2CO3 (1–7wt.%), with respect to the standard triaxial porcelain formulation. The experimental results showed that desirable properties for tableware porcelains can be attained if the Li2O-content does not exceed ∼1.5wt.%. In the light of this conclusion, the second series of formulations aimed at producing new porcelains using Li-bearing natural rocks. Under an industrial perspective, the most important finding is that these compositions matured at temperatures 100–120°C lower than the standard triaxial porcelain formulation and exhibited remarkable resistance at over-firing conditions. The role of increasing Li2O-content at the different stages of firing is interpreted in the light of its influence on densification, the evolution of crystalline phases and microstructure.