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Concentration of Colorado fluorite ores

Concentration of fluorite ores from Arizona, California, Idaho, Montana, Nevada, and Wyoming

Concentration of Utah fluorite ores

Concentration of gravity tailings from the Grasselli deposit, Park City, Utah

Concentration of manganese ores from Boulder Dam Recreational Area, Clark County, Nev.

Concentration of miscellaneous oxide manganese ores from Yavapai, Yuma, Maricopa, and Mohave counties, Ariz.

Concentration of oxide manganese ores from the vicinity of Death Valley National Monument, California


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