1) Lead mineral
Found on
https://www.crosswordclues.com/clue/boulangerite
Boulangerite is a sulfosalt mineral, lead antimony sulfide, formula Pb5Sb4S11. It was named in 1837 in honor of French mining engineer Charles Boulanger (1810–1849). It forms metallic grey monoclinic crystals. Sometimes the crystals form a fine feathery mass which has been called plumosite. Boulangerite is used as a lead ore. ...
Found on
http://en.wikipedia.org/wiki/Boulangerite
• (n.) A mineral of a bluish gray color and metallic luster, usually in plumose masses, also compact. It is a sulphide of antimony and lead.
Found on
http://thinkexist.com/dictionary/meaning/boulangerite/
Bou·lan'ger·ite noun [ From
Boulanger , a French mineralogist.]
(Min.) A mineral of a bluish gray color and metallic luster, usually in plumose masses, also compact. It is a sulphide of antimony and lead.
Found on
http://www.encyclo.co.uk/webster/B/85
Boulangerite, named after the French mineralogist Boulanger, is a bluish-grey coloured lead ore. It contains 55 percent lead. It has a relative hardness of 2.5.
Found on
http://www.probertencyclopaedia.com/browse/HB.HTM
a bluish lead-gray mineral, lead antimony sulfide, PbSbS, a minor ore of lead.
Found on
https://www.infoplease.com/dictionary/boulangerite
No exact match found.
