Gold Penny or Conterfeit?

A Gold Penny? 2001D 

I found this in my change today. Possible wrong planchet? Counterfeit? Coated? It looks like one of those golden dollars.

Update... A quick search and found the following: Silver (Zinc) and Brass Pennies Someone turned my penny to brass. And I thought it was valuable. Oh well, guess I'll just have to keep working.