Related Clues:

• It needs refining
• Klondike find, perhaps
• Mineral bearing rock
• Get a lode of it
• Underground treasure
• It's found in seams
• Galena, for instance
• It needs refinement
• Mispickel, e.g.
• Rockhound's find, perhaps
• Furnace input
• Ground-breaking discovery
• Metallurgy material
• Where Mt. Hood is
• Mined item