A tungsten mine working high-temperature wolframite-arsenopyrite-quartz veins in hornfels country rock. Famous for its specimens of quartz Japan-law twins associated with twinned ferberite.
Refs.:
- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1069.
- Mineralogical Record: 32: 468.
- Werner, A.B.T., Sinclair, W.D., and Amey, E.B. (1998): International Strategic Mineral Issues Summary Report - Tungsten. US Geological Survey Circular 930-O.
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Map Reference: 17°19'24"S , 66°51'13"W
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Mineral List:22 entries listed. 19 valid minerals.
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