piedmontite


Also found in: Encyclopedia.

piedmontite

(ˈpiːdmɒnˌtaɪt; -mən-) or

piemontite

n
(Minerals) 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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Mentioned in ?