Related Clues:
- Ore sources
- Blast furnace input
- Miner profits?
- They're found in pockets and seams
- Pitchblende and bauxite
- Subjects of assays
- Goes for the gold
- Unrefined metals
- Explosive devices
- Mining take
- Ones in need of refinement
- They may be driven to extraction
- Refinement targets
- Iron and copper, e.g.
- Miner samples