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

Origin of piedmontite

From German, dating back to 1850–55; see origin at Piedmont, -ite1
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British Dictionary definitions for piedmontite




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

Word Origin for piedmontite

C19: from Piedmont in Italy
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