Related Clues:

• It's fine for a refinery
• Pay dirt
• Miner's quest
• Lead ___
• Scuttle's contents
• Bauxite, e.g.
• Subject of testing
• Zoomed
• Hematite, for one
• Bauxite or magnetite
• It might be picked apart
• Smeltery supply
• Valuable find
• Underground deposit
• Pitchblende, e.g.