Browse mineral resources

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