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, or the 1955 Doubled Die Penny, with a striking double ...

Curious about alternative investments like valuable quarters? Find out how to invest in the different asset classes today. While most quarters are worth just 25 cents, some can be worth much more due to their rarity, age, or minting errors. Collectors ...

The last pennies were struck at the mint in Philadelphia, where the country’s smallest denomination coins have been produced since 1793, a year after Congress passed the Coinage Act. Officials said the final few pennies would be auctioned off.

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 either because they are very old, were minted in very ...

It looks like the U.S. Mint has struck again -- or actually, not struck again. Some of the new dollar coins featuring John Adams are missing edge inscriptions including "In God We Trust," according to the Professional Coin Grading Service, a Newport Beach ...