Related Clues:

• Subject of an assay test
• It might have a silver lining
• Prospector's strike
• Mined mineral
• See 111 Across
• Hopper load
• State that's home to Nike H.Q.
• Greedy shout
• Raw metal source
• Prospecting yield
• Seam stuff
• Mountain treasure
• ''-ite'' compound, often
• Bonanza in a mine
• One might get a lode of it