Related Clues:
- It may have a silver lining?
- Pyromorphite, e.g.
- Gentle powder
- Mine car contents
- Valuable rock
- Barbershop supply
- Soft rock?
- Major component of soapstone
- Pool-shooter's powder
- Soothing substance
- Rock with potential
- What some seams are made of
- It may pan out
- Miner's bonanza
- It's no. 1 on the Mohs scale