Related Clues:

• Malachite and others
• It may be raw
• It's fine for a refinery
• They come out at the seams
• Vein materials
• Pay dirt
• They may be refined
• Miner's quest
• Lead ___
• Raw materials
• They could use some refinement
• Bauxite, e.g.
• Subject of testing
• Input
• They're in vein