What material is the 1854 20.00 Liberty Gold Coin Copy made of?

Since copy coins don't have any standards, anyone can make a copy coin out of any material (lead, zinc, gold, silver, copper, etc.) only a coin dealer or jeweler who sees your coin in person can guess at what it is made out of. It has no collector value, the only value comes from the metals used to make it. Most are just gold-plated copper and have no value though.