Related Clues:

• Groundbreaking discoveries?
• Zoomed
• Hematite, for one
• Rock groups?
• Bauxite or magnetite
• It might be picked apart
• Smeltery supply
• They're in veins
• Valuable find
• Miner concerns
• Cobaltite and mispickel
• Underground deposit
• Assayers' samples
• Pitchblende, e.g.
• Scandinavian currency