augite

Founding-era definition · Webster's 1828 American Dictionary

AU'GITE, noun [Gr. brightness.] A mineral called by Hauy, pyroxene; often found in distinct crystals. Its secondary forms are all six or eight-sided prisms. Sometimes it appears in hemitrope crystals. It has a foliated structure, and is harder than hornblend. The varieties are common augite sahlite, fassaite, and cocolite. The omphacite of Werner appears also to be a variety; and the common augite found near the lake Baikal, has been called Baikalite. Werner divides augite into four sub-species; granular, foliated, conchoidal, and common; and there is a variety called slaggy augite
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI

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