Related Clues:

• Mineral bearing rock
• Get a lode of it
• Squeak-stopping application
• Olive or corn product
• Crude, e.g.
• Something struck
• Underground treasure
• It's found in seams
• Galena, for instance
• Crude stuff
• It needs refinement
• Monet work
• Source of the Getty fortune
• Mispickel, e.g.
• Rockhound's find, perhaps