AUGITE
augite
(noun) dark-green to black glassy mineral of the pyroxene group containing large amounts of aluminum and iron and magnesium
Source: WordNet® 3.1
Etymology
Noun
augite (countable and uncountable, plural augites)
(mineral) A variety of pyroxene, usually of a black or dark green color, occurring in igneous rocks, such as basalt.
Source: Wiktionary
Au"gite, n. Etym: [L. augites, Gr. augite.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition