Answer: augite

AnswerCrossword Clue
AUGITEComponent of basalt.
AUGITEVariety of pyroxene.
AUGITECommon mineral in rocks
AUGITEDark-green mineral
augitesilicate mineral, chiefly of calcium, magnesium, iron, and aluminum: a dark-green to black variety of monoclinic pyroxene, characteristic of basic rocks
augiteroxene
augitea usually black or dark green mineral that consists of aluminous pyroxene and is found especially in igneous rocks