Tomokoni mine, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosí Department, Bolivia
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Three small adits mined exclusively for vivianite specimens, located a few hundred meters downhill from the Canutillos mine (qv), to whose "Cooperativa" members it now belongs. Host rock is non-mineralized red argillaceous sandstone.
Note: This is NOT the locality for the recent abundant magnetite crystals from Potosi Department, an error on some dealers' labels - see Cerro Huañaquino locality.
5 valid minerals.
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