Related Clues:

• Hematite, e.g.
• Mine strike
• Cargo on the ill-fated Edmund Fitzgerald
• Mesabi output
• Limonite, for one
• Minnesota resource
• Furnace input
• Refinement candidate
• Turgite or limonite
• Raw material for steel
• Shipment to a steel mill
• Magnetite or hematite
• Edmund Fitzgerald cargo
• Taconite
• Birmingham resource