Related Clues:

• Seam treasure
• It's extracted
• It's picked
• Metal in the rough
• Heavy metal?
• Refined find
• It's north of Calif.
• Bonanza find, perhaps
• Seamy matter
• Smelter's need
• Rich rock
• Metal in rocks
• Source of iron or lead
• Refinable rock
• Graphite, e.g.