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