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piedmontite

[peed-mon-tahyt] /ˈpid mɒnˌtaɪt/
noun
1.
a mineral, similar to epidote but containing manganese: found in schists and manganese ores.
Origin
1850-1855
1850-55; < German; see Piedmont, -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for piedmontite

piedmontite

/ˈpiːdmɒnˌtaɪt; -mən-/
noun
1.
a dark red mineral occurring in metamorphic rocks: a complex hydrated silicate containing calcium, aluminium, iron, and manganese. Formula: Ca2(Al,Fe,Mn)3(SiO4)3OH
Word Origin
C19: from Piedmont in Italy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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