Related Clues:

• Substance for smelting
• Certain brocaded fabric
• Copper source
• It's rough stuff
• Seam find
• Quite uncool
• Vein makeup
• Refinery metal
• Valuable vein
• Hamstrung, e.g.
• Needing crutches
• Raw metal
• Uncool
• Contents of a lode-bearing wall?
• Source of gold