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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 of piedmontite
1850-1855
From German, dating back to 1850-55; See origin at Piedmont, -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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