Hornblende Root Name Group
Franklin Iron Furnace foundation excavation, Franklin, Sussex County, New Jersey, USA
7.0 x 5.2 x 3.2 cm. A cool old-time specimen from the historic "Franklin Furnace" locality in the Franklin Mining District. This piece is simply labeled "hornblende", which is a generic term for amphibole species, mostly ferro-hornblende or magnesio-hornblende according to the current nomenclature. This piece features sharp, dark greenish-black ...
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