Related Clues:
- Mine layer
- Fruit of a miner's labors
- Gold in them thar hills?
- Feldspar, e.g
- Underground resource
- Mineral in a wall, perhaps
- 10-Down source, e.g
- Forty-niner's pay dirt
- 4-Down contents
- Argentite, e.g
- Sought-after rock
- Tram car filler
- Valuable extraction
- Forty-niners' score
- 'You're going home at 9:00??'