Definitions for "Hornblende"
The common black, or dark green or brown, variety of amphibole. (See Amphibole.) It belongs to the aluminous division of the species, and is also characterized by its containing considerable iron. Also used as a general term to include the whole species.
A variety of the amphibole mineral group.
The most common variety of the amphibole group of minerals. A silicate containing iron and magnesium of complex composition.