Related Clues:

• PST st.
• It gets refined
• Refinery fodder
• Metal container?
• Willemite or wolframite
• 1/100 of a krone
• Bonanza, essentially
• A prospector might get a lode of it
• Bend's st.
• Prospector's yield
• Iron __
• Cinnabar, vis-à-vis mercury
• Wulfenite or cinnabar
• Lode stuff
• Extraction target