THE LESSER METALS. 259 



ANTIMONY. 



Senarmontite, Sb 2 O 3 ; Sb. 83.56 ; O. 16.44. 



Stibnite (Antimonite, Antimony Glance), Sb 2 S 3 ; Sb. 71.8 ; 

 S. 28.2. 



2.14.02. Antimony occurs in composition with several silver 

 ores, but almost its sole commercial source is stibnite. The oxide, 

 senarmontite, is rarely abundant enough to be an ore. Stibnite was 

 one of the minerals formerly cited as having originated in veins by 

 volatilization from lower sources. But it has probably, in all cases, 

 been derived from solutions of alkaline sulphides. 



2.14.03. Example 47. Veins containing stibnite, usually in 

 quartz gangue. California, Kern County. At San Emigdio a vein 

 of workable size has been found. It has a quartz gangue and is in 

 granite. The vein varies from a few inches to several feet across, 

 and has afforded some metal. Several others are known in San 

 Benito and Inyo counties. 



2.14.04. Nevada, Humboldt County. Stibnite has been known 

 for some years in veins with quartz gangue. The Thies-Hutchens 

 mines, about 15 miles from Lovelock station, were productive in 

 1891. Lander County. The most important of the American 

 mines are the Beulah and Genesee, at Big Creek, near Austin. 

 The vein is reported as showing three feet of nearly pure stibnite. 

 It produced 700 tons of sulphide in 1891, and was operated in 

 1892. 



2.14.05. Arkansas, Sevier County. Stibnite occurs in veins 

 with quartz gangue in southwestern Arkansas. Some attempts 

 liave been made to develop them, but the ore is reported to be too 

 remote for profitable working. The veins appear to be generally 

 interbedded in Trenton shales and to lie along anticlinal axes, 

 which trend northeast. They are all controlled by the United 

 States Antimony Company of Philadelphia. 



2.14.06. New Brunswick, York County. Veins of quartz or 

 quartz and calcite, carrying stibnite, occur over several square miles. 

 The wall rocks are clay slates and sandstones of Cambro-Silurian 

 age. The mines have been commercially productive. The veins 

 vary from a few inches to six feet. 



2.14.07. Example 48. Utah, Iron County. Disseminations of 

 stibnite in sandstone and conglomerate, following the stratification. 

 In Iron County, southwestern Utah, masses of radiating needles 

 occur in sandstones and between the boulders of an associated 

 conglomerate. Very large individual pieces have been obtained, 



