Related Clues:

• Metal containers
• They may be picked out
• Miner's quarry
• Source of iron
• It may have a silver lining
• Assayers' stuff
• Tram filler
• Malachite and others
• It's fine for a refinery
• They come out at the seams
• Bonanza
• Vein materials
• Pay dirt
• They may be refined
• Miner's quest