Hornblende (amphibole group)
Donor: Jaffe H.W.
Object number: 2020.6.3
DescriptionMany small samples in vial, label states "Ammonoosuc Volcanics", "from hornblende-cummingtonite amphibolite"
Reference: Mineralogical Society of America Special Paper 2, pp. 251-274, 1969.