THE MINERALS OF IDAHO 



155 



shoot" in the Bunker Hill mine at Wardner. 28 Partial analysis 

 made upon specimens of this material sent to the writer by Stanly 

 A. Easton show it to be boulangerite. A fibrous lead-antimony 

 mineral which is probably boulangerite was common as patches in 

 quartz in ores of the Standard-Mammoth ore body between the 

 1,800 and 2,000 foot levels and a similar mineral occurred as sub- 

 columnar and granular masses in galena in the ores of the Green- 

 hill- Cleveland ore shoot in the same mine. Boulangerite occurs in 



Figs. 26-27.— Pyrargyrite. Crystals resting on miargyrite. Henrietta mine, Owyhee County 



the East Hecla vein in the Hecla mine in small amounts as a late 

 deposit coating fractures in the ore. 29 



PYRARGYRITE (144) 



Dark Ruby Silver 



Silver sulphantimonite, 3Ag 2 S.Sb^S 3 . Hexagonal, rhombohedral. 



Pyrargyrite, which is commonly called dark ruby silver, is a com- 

 mon mineral in the richer silver ores of Idaho. It is usually gray in 

 color, with little suggestion of the red but when scratched it gives the 

 characteristic red streak or powder. Some polybasite also has a red 

 streak and has consequently been confused with pyrargyrite. 



16 Oscar H. Hershey. Origin and distribution of ore in the Coeur d'Alene. Private publication, printed 

 by Min. and Scientific Press, San Francisco, 1917, p. 24. 

 " Waldemar Lindgren. Personal communication, 1921. 



