. Bulletin - United States National Museum. Science. THE MINERALS OF IDAHO 141 ELMORE COUNTY Arsenopyrite occurs with gold in the Neal and Rocky Bar districts. Specimens from the Vishnu mine, Rocky Bar district show it as reddish-tarnishing gray masses and imperfect crystals in quartz. IDAHO COUNTY Arsenopyrite is reported from the Goodenough and other gold veins in the Warren district. A specimen of ore from the South Fork mine, 7 miles southwest of Elk City, Elk City district, shows small sharp steel-gray crystals of this mineral in quartz. LEMHI COUNTY Arsenopyrite occurs in gold ores of th
. Bulletin - United States National Museum. Science. THE MINERALS OF IDAHO 141 ELMORE COUNTY Arsenopyrite occurs with gold in the Neal and Rocky Bar districts. Specimens from the Vishnu mine, Rocky Bar district show it as reddish-tarnishing gray masses and imperfect crystals in quartz. IDAHO COUNTY Arsenopyrite is reported from the Goodenough and other gold veins in the Warren district. A specimen of ore from the South Fork mine, 7 miles southwest of Elk City, Elk City district, shows small sharp steel-gray crystals of this mineral in quartz. LEMHI COUNTY Arsenopyrite occurs in gold ores of the Mineral Hill district. The cobaltiferous variety, danaite, which is common in the cobalt ores of the Blackbird district is described below (page 143). OWYHEE COUNTY In Owyhee County arsenopyrite is associated with sphalerite, galena, etc., in the lead ores of the South Mountain district. A speci- men from the Bay State mine dump, this district, has abundant arsenopyrite with some black sphalerite and a little galena and chalcopyrite. The arsenopyrite is well crystallized in crystals of simple habit up to 1 cm. long. SHOSHONE COUNTY Arsenopyrite is a rather uncommon mineral in the Coeur d'Alene district and is practically absent from the larger lead-silver mines. Small crystals have been noted in slaty sericitic rock adjacent to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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