Related Clues:

• Rock genre, informally
• Quarter, for one
• Penny, e.g.
• It may be precious
• Gold, silver or bronze
• Invent, as a word
• Copper or nickel
• No-no in a microwave
• Normal habitat
• Slot feeder
• Piece of eight, e.g.
• Heavy genre
• Copper, for one
• Specie
• Originate, so to speak