Related Clues:
- Makeup of some seams
- Foundry delivery
- Magnetite, e.g
- Cinnabar or galena
- Rocks with metal
- It's all in your mine
- Mine layer
- Fruit of a miner's labors
- Gold in them thar hills?
- Possible response to 'Whose is this?'
- Feldspar, e.g
- Underground resource
- Mineral in a wall, perhaps
- 10-Down source, e.g
- Forty-niner's pay dirt