Related Clues:

• Unbreakable
• Like some stomachs or stoves
• Able to withstand anything
• Fort Knox piece
• Mint collectible
• Very strong, as a stomach
• Reserved bar?
• Form of gold
• Product of a mold
• A lump of gold
• Brick of gold
• Block of metal
• A brick shaped lump of gold
• A lump of metal
• Brick-shaped lump of cast metal