470 BULLETIN 131, UNITED STATES NATIONAL MUSEUM 



IDAHO COUNTY 



The first notice of the occurrence of scheelite in Idaho County is 

 by Benjamin Silliman, 81 who writes that a specimen was sent him 

 by a correspondent from the Charity Vein in the Warren district. 

 The material was mistaken for grossularite garnet on account of its 

 resemblance in color by the miners, but its high specific gravity 

 attracted attention. Gold occurs associated with a small amount of 

 pyrite scattered through the scheelite and there was a little chalco- 

 pyrite and arsenopyrite in minute grains in the specimen. The 

 scheelite was massive with few crystalline faces and had a yellow- 

 brown color resembling chondrodite. The miners had struck a 

 pocket of the scheelite-bearing ore and in a few evenings pounded 

 out a $1,000 gold value from a few candle boxes of the ore in a 

 hand mortar. This ore was thus very rich, although it is said that 

 the ore of the mine usually paid only about $20 a ton. It has recently 

 been stated that scheelite occurs in several gold-bearing quartz 

 veins in granite of the Unity Gold Mines Co., formerly the Little 

 Giant, Charity, and other mines near Warren. 82 



Buff scheelite occurs in grains and small masses disseminated in 

 quartz of specimens from the claims of the New York Mining Co. 

 near Newsome in the Ten Mile district. 



LEMHI COUNTY 



A little scheelite occurs in hubnerite-bearing veins in the Ima 

 mine, Blue Wing district, as a secondary product, in thin pale yellow 

 to white crusts lining open spaces in the coarse quartz gangue. 83 

 A little scheelite occurs with the molybdenite (q. v.) of the Mulkey 

 prospect. 84 



SHOSHONE COUNTY 



The earliest published reference to the occurrence of scheelite in 

 Shoshone County appears to be that by Blake, 85 who writes that 

 "tungstate of lime occurs massive in an auriferous quartz vein near 

 the town of Murray, Idaho Territory, on the western slope of the 

 Coeur d'Alene Mountains." In 1908 Auerbach 86 published an 

 excellent paper on the occurrence of the mineral in this district. 

 He says that the mineral has been found within a circle of about 3 

 miles radius taking Murray as the center. The principal localities 

 were the Golden Chest and Golden Winnie properties, but the mineral 

 had been found in other places in less quantities. In the days of 



81 On an association of gold with scheelite in Idaho. Amer. Journ. Sci., vol. 13, p. 451-452, 1877. 



82 D. C. Livingston. Univ. of Idaho Sch. of Mines, Bull. 2, pp. 26-27, 1919. 



83 J. B. Umpleby. U. S. Geol. Survey, Bull. 528, p. 79, 1913. 



»* D. C. Livingston. Univ. of Idaho Sch. of Mines, Bull. 2, p. 41, 1919. 

 8S W. P. Blake. Scheelite from Idaho. Amer. Journ. Sci., vol. 37, p. 414, 1889. 



M Herbert S. Auerbach. Tungsten ore deposits of the Coeur d'Alene. Engin. and Min. Journ., vol. 86, 

 p. 1146-1148, 1908. 



