(Kelly of the Clue Crew reports from the Denver Mint.) Production of quarters starts with coils of metal fed into a press; it's mainly this metal, that's more associated with pennies
The copper-plated zinc cent coins are... [DOC] [TLE] How Coins Are Made - Fact Monster [PAR] Step 1: Blanking, The U.S. Mint buys strips of metal about 13 inches wide and 
1,500 feet long to manufacture the nickel, dime, quarter, half-dollar, and dollar.