Check Your Wallets! The $1 Coin That Could Be Worth Thousands

It's time to empty out your pockets and coin purses because there are rare $1 coins in circulation which could be worth thousands, thanks to one tiny mistake.

In 2000 The Royal Australian Mint made an error when making 'Mule Dollar' coins, meaning a small number of coins were produced using the wrong print.

The difference between a regular coin and mule dollar is minor and would be easily missed.

While a normal $1 coin has a single rim around its edge while a Mule Dollar has a double rim.

An eagle-eyed Melbourne mother took to Facebook to highlight the error and that she was one of the lucky ones to find a "famous" Mule Dollar.

“Royal Australian Mint accidentally minted the coins using the smaller 10 cent obverse die (head side) by mistake," she explained.

“With just a 1.4mm difference in diameter between the 10 cent and $1 coin you can clearly see a double rim circle going around the edges of the coin."

She claims these errors are worth between $500 and $3000.

Dozens of people started commenting on the Facebook post, sharing images of odd or rare coins they had found with some even claiming to have gathered hundreds at auction.