Related Clues:

• Miner's quest
• Lead ___
• Diamond : 10 :: ___ : 1
• Bauxite, e.g.
• Subject of testing
• Magnesium silicate
• Zoomed
• Hematite, for one
• Bauxite or magnetite
• It might be picked apart
• Smeltery supply
• Valuable find
• Underground deposit
• Pitchblende, e.g.
• Powder base