An extremely rare Aussie coin is going under the hammer next week and it's expected to fetch more than $100,000. Coins have been selling for impressive prices all across the country recently but this one is extra special.

It is one of only five that were made by the Royal Australian Mint in 2016 to celebrate Australia's Rio Olympics team. The owner has decided to put it up for auction because he has no room to store it and it's coincidentally just in time for the 2024 Paris Olympics.

Jim Noble, managing director of Noble Numismatics, told Yahoo Finance its incredibly low mintage makes it a standout for any serious coin collector.

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"This is Australia's rarest coin really, only five minted and this is number one," he said. "It's virtually the lowest mintage you could get.

"If someone wants to own the best Australian coin collection, you've got to own this."

The 1kg coin is made up of 99.99 per cent gold and even though it only cost $3,000 to make, it's set to grab bids well into the six-figure mark. When the five were originally up for grabs back in 2016, the Royal Mint slapped an $80,000 price tag on it.

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Considering the current price for a kilogram of pure gold is roughly $118,000, the rarity of this particular coin could get bidders throwing up their paddles for a piece of history.

The coin will be sold by Noble Numismatics at the NSW State Library on Tuesday, July 30.

It features a portrait of Queen Elizabeth II on the face side and an intricate artwork on the reverse side that showcases "the 32 disciplines from the 28 sports that Australians" competed in at the 2016 Games.

"This stunning work of art struck in precious metals is the ultimate memento of Australia’s ongoing sporting achievements," the Royal Mint said.

Noble said there have already been hundreds of people who have registered for the auction next week and he's expecting to have interest from all over the world.

Other items on sale that could fetch a pretty penny

If you don't have a spare $100,000 for a piece of history, there are a few other items that might tickle your fancy:

• A one-kilogram $30 silver Olympic coin, which is one of only 30 minted and is valued at $1,500.

• An Australian 1930 penny, one of the scarcest ever issued, is valued at around $35,000, and another one with slightly more wear that's worth roughly $18,000.

• An Adelaide pound issued in 1852, which was Australia’s first-issued gold coin, and is nearly uncirculated and rare in this condition. It's valued at $35,000.

• A New South Wales 15 pence or dump from 1813, which was the state's and also Australia’s first-issued coinage, is worth an estimated $35,000.