stilpnomelane
Noun. (mineralogy) A metamorphic phyllosilicate mineral of the mica group, having the chemical formula K(Fe2+,Mg,Fe3+)8(Si,Al)12(O,OH)27.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.