Boulangerite
Boulangerite ({not transcribed}) , noun
[From Boulanger, a French mineralogist.]
(Mineralogy) A mineral of a bluish gray color and metallic luster, usually in plumose masses, also compact. It is a sulphide of antimony and lead.
Boulangerite ({not transcribed}) , noun
[From Boulanger, a French mineralogist.]