Dictionary.com
Thesaurus.com

piedmontite

American  
[peed-mon-tahyt] / ˈpid mɒnˌtaɪt /

noun

  1. a mineral, similar to epidote but containing manganese: found in schists and manganese ores.

piedmontite British  
/ -mən-, ˈpiːdmɒnˌtaɪt /

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

"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

Etymology

Origin of piedmontite

From German, dating back to 1850–55; Piedmont, -ite 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.