What is the value of a 1963 Full Liberty copper nickel?

Circulating U.S. 5¢ pieces have never been struck in copper. You most likely have one of the following:

> A coin that was copper-plated as part of a high-school chemistry experiment. It should weigh 5.0 gm.

> A coin that was exposed to heat or some chemical agent that changed its color. Again, the weight s/b 5.0 gm.

> A coin that was accidentally struck on a blank intended for a foreign coin. Its weight may be different from 5.0 gm.

The first 2 are only worth 5 cents. The third would have to be authenticated by a dealer who specialized in error coins, and could be worth a premium.