When that coin crossed the auction block, it realized $15,862.50, a figure that has since become shorthand among collectors for how extreme mint errors can rewrite the value of a modern quarter. The ...

Add Yahoo as a preferred source to see more of our stories on Google. Peter Gudella via Shutterstock Minting coins isn't exactly an exact science. Even though most ...

Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime steel ...

As with just about any asset, a coin's value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

People are encouraged to scrutinise their loose change for a rare £2 coin that could be worth significantly more than its face value. An expert has suggested that ...