Related Clues:

• They're found in prospectors' sectors
• Mined metals
• Mesabi Range yield
• Loads from lodes
• Mine extracts
• Valuable rocks
• Hematite, pyrite, etc.
• Vein yields
• Vein pursuits
• Bonanza finds
• Lucky strikes
• Smelter input
• Mining finds
• Mine diggings
• They're not refined