Related Clues:

• Galena and bauxite
• Panners' finds
• Mine rocks
• They may be found in prospectors' sectors
• They need refinement
• Lode yields
• Raw metals
• Some rocks
• Assay materials
• Feldspar and others
• Metal in the rough
• They can be refined
• They're found in lodes
• Refinery input
• They're found in pockets