Related Clues:

• It's all in vein
• Dig this?
• Mine contents
• Tramcar lode
• Unrefined mineral
• Bauxite, to aluminum
• Lead from a mountain?
• It might hold gold
• Underground find
• Mineral quest
• Valuable find in the ground
• Useful mineral
• Good source of iron?
• Lorry lode, perhaps
• Blast furnace stuff