The Collaborative International Dictionary
Plumosite
Plumosite \Plu"mo*site\, n. (Min.) Same as Jamesonite.
Wiktionary
plumosite
n. (context mineralogy English) jamesonite.
Wikipedia
Plumosite
Plumosite can refer to any feather ore, i.e. any ore that forms fine capillaries within the surrounding rock.
Generally it is a synonym for either Boulangerite, Jamesonite or Zinkenite.
Category:Mineralogy