Discover rare 1990 penny errors, their values, and how apps like CoinKnow help identify valuable coins instantly.

Turns out these common minting mistakes from 1979 are worth up to $5,000 - and you might have one sitting in your change jar ...

Explore the 1967 quarter error list, including DDO, DDR, off-center, wrong planchet, and rare silver errors, plus values and identification tips for collectors.

The error coin market has exploded in ways that would make even seasoned collectors' heads spin. What started as casual ...

Explore the most valuable 1970 quarter errors, including overstrikes, doubled dies, off-center strikes, and wrong planchet ...

The late painter and PBS icon Bob Ross famously said there are no such things as mistakes with art, only “happy accidents.” When it comes to the art of coin production, those happy accidents can make ...

Joel Kandiah, a numismatist, has revealed a significant error made by the Royal Australian Mint, catapulting the value of a batch of $1 coins. Going by the moniker ...

The scarcity of the pieces means collectors are willing to pay for them A RARE £2 coin could fetch a staggering £1,000 if you spot a tiny but crucial mistake. A coin expert has revealed the exact ...

The 1975 penny error list includes some remarkable mint mistakes that can transform an ordinary cent into a valuable treasure ...

Scroll down to find out how to sell your coins A rare £2 coin could bag you a whopping £1,000 if you spot one simple detail. A social media coin expert has revealed ...