How much is the Kew Gardens 50p worth? Rare coin could fetch £50… and 7 more coins that could be worth a small fortune

A RARE commemorative 50p piece which features Kew Gardens could be worth much more than it's face value as collectors are trying to snap them up at auction.

The coin, which was manufactured in 2011, celebrates the 250th anniversary of the Royal Botanical Gardens but The Royal Mint only released 210,000.

This is compared to the 2008 Royal Arms coin which was manufactured 22.7 million times and the 2010 Girl guiding design in 2010 which was produced 7.5 million times.

The Royal Mail has declared the Kew Gardens coin the rarest in circulation but currently it's estimated that one in 300 people have one, however private collectors are quickly gathering them up.

But if you don't have one of the Kew Gardens check your change for one of these special coins:

London Olympics 50p coin - £3,000 

To celebrate the 2012 London Olympics, The Royal Mint released a 50p piece with 29 difference designs - but some were produced more than others.

If you've managed to collect a full set of coins, you could fetch around £35 at auction, or if you possess a football, wheelchair rugby, wrestling and tennis piece you could be looking at £3-4.

But one London Olympics coin is worth gold if you have it - the original aquatic coin, which shows water passing directly over the swimmer's face.

There were only 600 coins created before the design changed slightly to show a swimmer's face but if you have one it could earn you up to £3,000 in eBay.

The 'New Pence' 2p coin from 1983 - £650

Up until 1981 all 2p coins had the words 'New Pence' inscribed on the reverse but a year later The Royal Mint decided to change it to say 'Two Pence."

But, in 1983 The Royal Mint accidentally released a small number of coins which had the old inscription of 'New Pence" on them.

A lot of the coins were snapped up by collectors, but if you happen to have one in a penny jar, it could be worth up to £650.

Dateless 2p coin - £100

In 2008, The Royal Mint decided to change the positioning of the date on every 20p piece, moving it from the back to the front.

But in an accidental error, a batch of between 50,000 - 200,000 coins were released without a date at all - if you have on in mint condition it could fetch up to £100.

The EC commemorative 50p coin - £20

Between 1992 and 1993, the Royal Mint released a commemorative 50p piece to celebrate the British presidency of the council of Europe.

Only 109,000 coins were released and while they're no longer in circulation because of the reduction in size of 50ps in 1997, if you have one lying around, you could be looking at a price of £20.

Guy Fawkes £2 coin - £16

Often the Royal Mint will change the design of the £2 coin for commemorative purposes and in 2005, they released the Guy Fawkes coin in aid of the 400th anniversary of the gun powder plot.

Unfortunately, some of the coins were released with a typo on the inscription which read:“Pemember, Pemember the Fifth of November" instead of “Remember, Remember” - now they can fetch around £16 on eBay.

Charles Dickens £2 coin - £8

In 2008, the Royal Mint released a £2 coin to celebrate the 200th anniversary of the birth of Charles Dickens, the coin featured some of the author's most famous book titles.

The coin is regarded as a collectable because only 20,000 were created and now they're worth around four times its face value.

Mary Rose and King James Bible £2 coins - £6 

In 2011 the Royal Mint released two separate £2 coins in celebration of the 500th anniversary of the Mary Rose and the 400th anniversary of the King James Bible.

There were only 20,000 of each coin released and they could fetch around three times their face value.