acmite

noun

ac·​mite

ˈak-ˌmīt

plural -s

: a mineral consisting of a brown or green silicate of sodium and iron NaFe(SiO₃)₂ belonging to the pyroxene group and often found in long prismatic crystals characteristically pointed (hardness 6–6.5, specific gravity 3.50–3.55)

called also aegirite

Word History

Etymology

German achmit, from Greek akmē + German -it -ite

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