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BULLETIN 131, UNITED STATES NATIONAL MUSEUM 



faces of o is perfect in form and transparency and about 1 cm. in 

 diameter. Frequently the crystals from this mine are coated on the 

 prism and pinacoid faces with limonite while the domes are clear 

 and brilliant. 



In the Highland-Surprise mine anglesite occurred in specimens 

 from the Highland- Chief tunnel as a compact ash-grey coating around 

 lumps of galena, the anglesite in turn being coated with limonite. 



The Hypotheek mine near Kingston has produced the finest 

 crystals of anglesite that have been found in the State. Indeed it is 



doubtful whether any locality in 

 the United States has surpassed 

 this locality in the size and 

 beauty of its crystals. The ores 

 of the mine are oxidized to an 

 unusual depth and consist largely 

 of cerusite. Large bunches of 

 pure granular galena occur sur- 

 rounded by soft ocherous ma- 

 terial, which consists mainly of 

 oxides of iron and manganese, 

 and contains bunches of cerusite, 

 malachite, covellite, bindheim- 

 ite, etc. It is in cavities in the 

 residual lumps of galena that 

 the fine anglesite crystals occur. 

 These crystals are colorless, per- 

 fectly transparent, and exceed- 

 ingly brilliant. The crystals ex- 

 amined by the writer, and de- 

 scribed in a previous paper, 52 

 were obtained in September, 

 1916, from a small mine car of 

 ore beneath the surface bins. This ore had been shot down, shoveled 

 into a chute, and probably handled a half dozen times through cars 

 and bins, yet after this prolonged abuse the protected cavities and in- 

 teriors of the lumps contained crystals equal to the finest specimens 

 from Sardinia at present visible in American collections. In the pos- 

 session of Thomas Strick, a foreman at the mine, was seen a lump of 

 galena having a cavity several inches across lined with ideally perfect 

 doubly terminated crystals an inch or more in length having the 

 form shown in Figure 152. Two smaller specimens from the same 

 cavity were obtained at the time. One of these is now in the collection 



Fig. 



152.— Anglesite. Hypotheek mine, Sho- 

 shone County 



M Earl V. Shannon. Anglesite from the Coeur d' Alene district, Idaho. Amer. Journ. Sci., vol. 47, pp. 

 287-292, 1919. 



