piedmontite


piedmontite

noun

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

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

Leave a Reply

Your email address will not be published. Required fields are marked *

44 queries 1.214