Related Clues:

• Cue tip application
• Smelting need
• See 112-Down
• It's refined
• Mineral deposit
• Refinery rocks
• Prospector's discovery
• Forty-niner's find
• I-5 state
• Post-shower sprinkling
• Tram cargo, perhaps
• #1 on the Mohs scale
• Extraction candidate
• Underground-railroad cargo
• Mine content