piedmontite

piedmontite

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

Origin:
1850–55; < German; see Piedmont, -ite1

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piedmontite or piemontite (ˈpiːdmɒnˌtaɪt, -mən-, ˈpiːdmɒnˌtaɪt, -mən-)
 
n
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
 
[C19: from Piedmont in Italy]
 
piemontite or piemontite
 
n
 
[C19: from Piedmont in Italy]

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