Pietra di Malanaggio, from Malanaggio, Val Chisone, Piedmont, Italy
Geological description:
Grey medium-grained foliated meta-granodiorite with aligned brownish altered amphibole.
Comments:
Nos. 881 and 886 are most probably diorite di Malanaggio, originally from Malanaggio, Val Chisone, Piedmont, Italy, and now obtained from the nearby commune of San Germano Chisone. Note that cavities in biotite are coloured by orange-brown polishing compound.