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"