Related Clues:

• Moneymaking rock groups?
• Rocks found in mines
• Many "-ite" minerals
• Mining hauls
• What you might take your lead from?
• Iron, bauxite and copper
• Sought-after stuff in mines
• Sources of gold and silver
• Raw resources
• Minerals ending in "-ite," often
• Vital parts
• Seedy centers
• Argentite and zincite
• Picked-over substances
• Metallurgist's specimens