Related Clues:

• Vein makeup
• Refinery metal
• Valuable vein
• Raw metal
• Contents of a lode-bearing wall?
• Source of gold
• Valuable deposit
• Rock hound's find, perhaps
• Tram contents
• Underground asset
• Discovery in a seam
• Smeltery material
• Nickel source
• Mineral bearing rock
• Smelting need