Related Clues:

• Draw material from
• 4-Down contents
• Argentite, e.g
• Sought-after rock
• Tram car filler
• Valuable extraction
• Forty-niners' score
• Greedy kid's declaration
• Bed rock?
• Deposit of a sort
• Rock for miners
• What to take the lead from
• Rock bands, possibly?
• Miner's goal
• Mine extraction