schefferite

noun

schef·​fer·​ite

ˈshefəˌrīt

plural -s

: a mineral (Ca,Mn)(Mg,Fe,Mn)Si₂O₆ that is a brown to black variety of pyroxene containing manganese and frequently much iron

Word History

Etymology

Swedish schefferit, from H. T. Scheffer †1759 Swedish chemist + Swedish -it -ite

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