Mineral Resource Map
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North America
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Philadelphia
Barbe* Quarry
Occurrence • Molybdenum
Hoffma* Quarry
Occurrence • Tungsten
Franklin Smelting & Refining
Producer • Copper
Ap Green Refrac-Remmey Div-Phil, Pa
Producer • Zirconium
Hoffmans Quarry
Past Producer •
U S Gypsum Co--Philadelphia, Pa.
Past Producer • Gypsum-Anhydrite