Answer: augites

AnswerCrossword Clue
augitesroxene
augitesAUGITE, a mineral
augitesa usually black or dark green mineral that consists of aluminous pyroxene and is found especially in igneous rocks
augitessilicate mineral, chiefly of calcium, magnesium, iron, and aluminum: a dark-green to black variety of monoclinic pyroxene, characteristic of basic rocks