This undated photo provided on Wednesday, Dec. 19, 2012 by the U.S. 

This undated photo provided on Wednesday, Dec. 19, 2012 by the U.S. Mint in Philadelphia shows a bonneted Martha Washington on a nonsense test piece.  The Mint has been testing different materials to fiend less expensive ways to make coins. (AP Photo U.S. Mint)
Associated Press
This undated photo provided on Wednesday, Dec. 19, 2012 by the U.S. Mint in Philadelphia shows a bonneted Martha Washington on a nonsense test piece. The Mint has been testing different materials to fiend less expensive ways to make coins. (AP Photo U.S. Mint)
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