Related Clues:

• It's fine for a refinery
• Pay dirt
• Miner's quest
• Lead ___
• Bauxite, e.g.
• Top prize
• Subject of testing
• Basket-of-___ (yellow perennial)
• Zoomed
• Hematite, for one
• Rush order?
• Bauxite or magnetite
• It might be picked apart
• Smeltery supply
• Valuable find