One of the mysteries of the English language finally explained.
A dark green or black aluminosilicate mineral of the pyroxene group. It occurs in many igneous rocks, including basalt, gabbro, and dolerite.
- ‘The cpx is classified as augite based on average composition, and displays a very narrow compositional range.’
- ‘As cooling continues, plagioclase (a mixture of two kinds of aluminum silicates) and the pyroxene mineral augite (a magnesium silicate mixed with some iron) form.’
- ‘The plagioclase feldspar weathers to produce a whitish gray rock, while the mafic minerals (olivine, augite and hypersthene) produce contrasting darker grains.’
- ‘Minerals that remove Ti include augite and ilmenite/titanomagnetite.’
- ‘The most common phenocryst silicate phases are olivine, plagioclase and augite, typically, although not always, appearing in that order.’
Early 19th century: from Latin augites, denoting a precious stone (probably turquoise), from Greek augitēs, from augē ‘lustre’.
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