Related Clues:

• Bauxite and stibnite, e.g.
• Shale layers
• Claim valuables
• Tiers
• Underground treasures
• Pitchblende and cassiterite, for two
• Metal-bearing minerals
• Underground sources of income
• Smeltery needs
• Mineral sources
• Tram loads, often
• Prospectors' prizes
• Tram contents
• Bauxite and galena
• Metal-filled rocks