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piedmontite

[peed-mon-tahyt]
noun
  1. a mineral, similar to epidote but containing manganese: found in schists and manganese ores.
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Origin of piedmontite

From German, dating back to 1850–55; see origin at Piedmont, -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for piedmontite

Historical Examples

  • Amongst the latter, in Shikoku, there is an extremely interesting rock consisting largely of piedmontite.

    Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 2

    Various

British Dictionary definitions for piedmontite

piedmontite

piemontite

noun
  1. a dark red mineral occurring in metamorphic rocks: a complex hydrated silicate containing calcium, aluminium, iron, and manganese. Formula: Ca 2 (Al,Fe,Mn) 3 (SiO 4) 3 OH
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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