A variety of pyroxene, usually of a black or dark green color, occurring in igneous rocks, such as basalt; -- also used instead of the general term pyroxene.
A variety of the mineral pyroxene containing aluminum. Usually black or dark green, occurring in igneous rock such as basalt. Sometimes used to refer to any pyroxene.
(aw' gite) - A common mineral of the pyroxene group with the complex formula, Ca(Mg,Fe,Al)(Si,Al)2O6.
dark-green to black glassy mineral of the pyroxene group containing large amounts of aluminum and iron and magnesium
Augite - A monoclinic pyroxene mineral composed of calcium magnesium silicate with considerable aluminum and iron; an important component of basalts and andesites.
a dark greenish-black mineral of the pyroxene group. An essential miner-al of many mafic igneous rocks. It usually exists as irregular, blocky masses. It does break along flat, reflective surfaces, which meet at right angles.
Augite is a mineral described chemically as (Ca,Mg,Fe)SiO3 or calcium magnesium iron silicate. The crystals are monoclinic and prismatic. Augite has two prominent prismatic cleavages, meeting at angles near 90°.