If you are a rare coin collector, you know it’s not always the perfect coins that are the most valuable. There are many ...

This took place just as the U.S. Mint was working on a new metal alloy for coins. The alloy had a gold tint that was eventually used for the one-dollar Sacagawea coins that came out in 2000.

The coin disks, known as planchets, were cast from a test alloy for the Sacagawea dollar. In addition to the golden glow ... issued five new quarters each year in the order that the states ...