THE MINERALS OF IDAHO 457 



(1) Form measured <p=16 56 p = 55 43 



(153) calculated *>=17 31 p = 55 25 



(2) Form measured <f>= 3 46 p = 67 07 



(4.15.5) calculated <f>= 2 52 P = 68 11 



(141) calculated <p= 3 52 P = 73 15 



(T31) calculated <p= 3 09 p = 68 10 



(3) Form measured v= 2 09 p = 62 13 



(2.10.5) calculated <p= 2 32 P = 58 54 



(T63) calculated v=_3 40 p = 5S 58 



(4) Form measured v>=36 54 p = 42 16 



(TO.5.6) «P = 35 43 p = 41 33 



(211) ^ = 40 56 p = 47 41 



None of the forms can be considered as established by these data 

 which merely serve to indicate the desirability of further study of 

 material from the locality. 



ELMORE COUNTY 



Linarite occurs sparingly in a specimen from the Atlanta lode, 

 Atlanta district, as films and thin crusts of minute deep blue crystals 

 with anglesite lining cracks in coarse grained argentiferous galena 

 containing grains of stephanite and pyrargyrite. The crystals are 

 too small to be measured on the 2-circle goniometer nor could their 

 form be deciphered by study under a binocular microscope. 



FREMONT COUNTY 



Linarite forms a bright blue crust of closely intergrown crystals in 

 parallel position, on a mass of cerusite etc., in a specimen from the 

 Wilbert mine in the Dome district as mentioned by Umpleby. 56 The 

 crystals are not measurable. 



OWYHEE COUNTY 



Specimens from the Monkey mine, South Mountain district, 

 contain stains and crusts of minute blue crystals of linarite with 

 bindheimite in ashy gray anglesite which coats coarse galena. An 

 old specimen from the Laxley mine, in this district, contains a con- 

 siderable amount of linarite in indistinct crusts of intergrown blue 

 crystals which are not suitable for measurement. 



SHOSHONE COUNTY 



Out of a lot of 10 specimens supposed to be azurite from the 

 Caledonia mine, in the Coeur d' Alene district, 2 proved to be lina- 

 rite. 57 The first of these shows a rosette about 1 cm in diameter of 

 flat bladed blue crystals implanted on a joint surface in a mass made 

 up of quartzite fragments cemented by cerusite and covellite. The 

 linarite crystals are bright blue in color and more adamantine in 



* J. B. Umpleby. U. S. Qeol. Survey, Prof. Paper 97, p. 117, 1917. 



» 7 Karl V. Shannon. Linarite and leadhillite from Idaho. American Mineralogist, vol. 4, p. 93, 1919. 



