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schefferite

noun schef·fer·ite \ ˈshefəˌrīt \
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Definition of schefferite

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

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Origin and Etymology of schefferite

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

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