Related Clues:

• Silver or steel
• Copper or aluminum
• Lead, for one
• Metallic mix
• Rock genre, informally
• Metal mixture
• It may be precious
• Gold, silver or bronze
• Copper or nickel
• Steel, e.g.
• No-no in a microwave
• Heavy genre
• Copper, for one
• Cupronickel, for one
• Magnalium, e.g.