What is the value of a 1946 half dollar with a gold eagle?

Your coin has been plated for use in jewelry or as a so-called "collectible". A number of private companies take standard coins and apply a thin layer of gold to parts of the design.

Some are intended for use in a locket or pendant where they can be very attractive, but others are sold at inflated prices as "investments". In reality the plating process has damaged the coin so it loses most or all of its collector value. The good news is that the underlying silver can be worth $7 or $8 retail at 2010 prices.