Polished slab showing broken pyrite in vein quartz, North Star mine, No. 1. Nevada County, California. 1931.
Dates
Date Taken
1931
Summary
Photographs of ore: Polished slab showing broken pyrite in vein quartz, North Star mine, No. 1 vein, 8,200-foot level. Nevada County, California. 1931. Plate 11-A, U.S.Geological Survey Professional paper 194. 1940.
Summary
Photographs of ore: Polished slab showing broken pyrite in vein quartz, North Star mine, No. 1 vein, 8,200-foot level. Nevada County, California. 1931. Plate 11-A, U.S.Geological Survey Professional paper 194. 1940.
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