Related Clues:

• It passes through adits
• Rocky riches
• It's mined and refined
• Easily-scratched mineral
• Soapstone, mostly
• Raw rock
• Seam material
• Bucket conveyor's load
• Calif.'s northern neighbor
• Pyrite, e.g.
• Tramcar cargo
• Pac. NW state
• Dig this
• Alcoa purchase
• Baby powder mineral