Related Clues:

• Mine matter
• It may have a silver lining?
• Pyromorphite, e.g.
• Reader's goal
• Mine car contents
• Valuable rock
• Rock with potential
• What some seams are made of
• You get a credit for it
• It may pan out
• Thing to play
• Miner's bonanza
• Auditioner's aim
• Galena or mispickel
• Hematite, e.g.