This is a double-mica granitic orthogneiss with a special medium-fine eye-gneiss structure, very homogeneous, with a clear preponderance of light minerals (quartz, feldspar and plagioclase) in comparison with the micas. This also belongs and marked in such a way that the stone has a more typical granite aspect, while maintaining a gneiss layering; this kind of material is known historically as "Granito del Sempione"