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 ...

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 ...

While most quarters are worth exactly 25 cents, a rare error of this quarter has fetched five figures at auction.

A coin sitting in a jar or drawer could be worth thousands of dollars if it has a rare mistake from the U.S. Mint. Some 1999 ...

A Littleton Coin Company employee uncovers a rare struck-through error on a new 2026 quarter, sparking early collector ...