Related Clues:

• Ruby, e.g.
• Source of iron or lead
• Refinable rock
• Graphite, e.g.
• Meat or wine designation
• It may be picked out
• ___ alert
• Sommelier's suggestion
• Galena or hematite
• Refinery input
• Carrot-top's nickname
• Bonanza stuff
• Heavy metal band?
• Miner matter
• Piece of mine?