Related Clues:

• It's quite attractive
• Hematite, e.g.
• Mine strike
• Cargo on the ill-fated Edmund Fitzgerald
• Mesabi output
• Limonite, for one
• Minnesota resource
• Furnace input
• Refinement candidate
• Iron attractor
• Turgite or limonite
• Raw material for steel
• Natural magnet
• Shipment to a steel mill
• Magnetite or hematite