Related Clues:

• Smelter's raw material
• What copper comes from
• Unrefined find at a mine
• Resource in The Settlers of Catan board game
• Raw rock from Who repeated
• Metal that's mined
• Cockney hero heading north, finding gold-bearing rock?
• Important resource for a crossword constructor?
• Historic trail terminus: Abbr
• Tram load at a mine
• Mine content worth something
• Sought-after mine content
• What some rail cars carry
• Smelting stuff
• Pyrolusite, e.g