piedmontite

[ peed-mon-tahyt ]

noun

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

piedmontite

/ -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

Word History and Origins

Origin of piedmontite¹

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

Word History and Origins

Origin of piedmontite¹

C19: from Piedmont in Italy

Example Sentences

Belonging to the same isomorphous group with epidote are the species piedmontite and allanite, which may be described as manganese and cerium epidotes respectively.

From Project Gutenberg