a hard, heavy, dark-colored, monoclinic mineral, one of the amphiboles, (Ca,Na)(Mg,Fe,Al)(Al,Si)O(OH)
Origin of hornblendeGer: see horn and blende
The most common mineral in the amphibole group, CaNa(Mg,Fe)4(Al,Fe,Ti)3Si6O22(OH,F)2 commonly green to black, found in igneous and metamorphic rocks.
Origin of hornblendeGerman Horn horn ( from Middle High German) ( from Old High German; see ker-1 in Indo-European roots.) Blende blende ; see blende .