Related Clues:

• Mine diggings
• They're not refined
• See 9-Down
• Metal containers
• They may be picked out
• Miner's quarry
• Assayers' stuff
• Malachite and others
• They come out at the seams
• Vein materials
• They may be refined
• Raw materials
• They could use some refinement
• They're in vein
• Groundbreaking discoveries?