Related Clues:

• Rock in a survival kit
• Nothing is returned wrapped in paper and stone
• Water crisis city
• Mari Copeny's city
• Low-tech fire starter
• City NNW of Detroit
• Michigan city where many Christopher Paul Curtis books are set
• *What might make sparks fly?
• Kind of hard stone
• Sparks may fly from it
• Material for a lighter wheel
• Michigan city where General Motors began