Related Clues:

• It's fine for a refinery
• Pay dirt
• Miner's quest
• Lead ___
• Bauxite, e.g.
• Natural do
• Subject of testing
• High-profile hairdo
• Zoomed
• Hematite, for one
• Bauxite or magnetite
• It might be picked apart
• Smeltery supply
• Voluminous do
• Valuable find