Boulangerite
Pronunciation : Bou*lan"ger*ite
Part of Speech : n.
Etymology : [From Boulanger, a French mineralogist.] (Min.)
Definition : Defn: A mineral of a bluish gray color and metallic luster, usually in plumose masses, also compact. It is sulphide of antimony and lead.
Source : Webster's Unabridged Dictionary, 1913