Related Clues:

• Galena or cinnabar
• Galena, for one
• Black power source
• Homonym of 2-Down
• Can you dig it?
• Gold holder
• Lode contents
• Vein contents
• Part of a krona
• Metallurgist's material
• Kentucky resource
• Vein content
• Rush attraction
• Anthracite
• Mined-over matter?