The top of Kearsarge is composed of andalusite schist.
"The Bay State Monthly, Volume 3, No. 5" by Various
Younger felspars, as well as mica, are developed, and there arise also sillimanite, garnet, andalusite and many others.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6" by Various
Sillimanite and andalusite are not infrequent ingredients of gneiss, and their presence has been accounted for in more than one way.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2" by Various