There are few film props more instantly recognisable than the 'One Ring' from The Lord of the Rings: The Fellowship of the Ring.

A simple gold band forged in the fires of Mount Doom became one of the defining symbols of modern cinema and now, 25 years after Peter Jackson first brought Middle Earth to the big screen, it has found its way onto a 50p coin.

The Royal Mint have today unveiled a collectable 50p marking the anniversary of The Fellowship of the Ring and it comes with something genuinely extraordinary - a hidden Eye of Sauron revealed only when light strikes the coin at precisely the right angle.

It is not a colour changing trick or printed illusion. Instead, The Royal Mint has used what it describes as groundbreaking 'caustic technology', engineering the surface of the coin so precisely that it bends and focuses light to reveal the hidden image from the centre of the Ring itself.

Rebecca Morgan, director of commemorative coin at The Royal Mint, said: 'Even the most devoted fellowship of collectors couldn't have imagined a coin quite like this.'

It is the first time the technology has appeared on a UK coin available to the public and, having seen the effect in action, it feels exactly the sort of release collectors will still be talking about years from now.

Because the commemoratives that become future classics are rarely the ones that simply mark an anniversary. 

They are the coins that introduce something memorable, feel different physically and capture a moment in collecting culture. This one has all the ingredients.

The design, created by Royal Mint artist Thomas T. Docherty, centres around the One Ring complete with the famous Elvish and Black Speech inscription: 'One Ring to rule them all…' and the hidden Eye of Sauron feature feels perfectly tied to Tolkien's mythology. 

There is something wonderfully fitting about a coin inspired by the ring containing a secret hidden within its surface, only revealed when viewed in the correct light.

That sense of interaction matters enormously in the collectibles market because the pieces people remember are usually the ones they engage with. 

This is the sort of coin owners will immediately show to friends under a lamp or phone torch, the sort of release that people will actively demonstrate, interact with rather than simply store away in a drawer.

And crucially, in coin collecting worlds, the subject matter could hardly be stronger - The Lord of the Rings: The Fellowship of the Ring was not simply a successful film adaptation of J. R. R. Tolkien's epic novel.

Peter Jackson's trilogy became one of the defining cinematic achievements of the last quarter century, winning 17 Academy Awards, grossing billions worldwide and creating a fanbase that remains enormous today. 

Middle Earth has become part of popular culture in a way very few franchises ever achieve and that gives memorabilia tied to the films lasting appeal far beyond the initial release.

From a collector's perspective, this release also arrives at exactly the right time. 

Britain has become a nation of coin lovers, with the 50p firmly established as one of the country's most collected item. 

Millions of people who would never previously have considered themselves collectors now actively buy commemorative coins and complete themed sets - and it's worth pointing out this is not a circulating coin.

The Royal Mint understands the market extremely well and this feels like one of its smartest recent releases because it combines innovation, craftsmanship and a globally recognised franchise in a way that feels genuinely cohesive.

The Mint plans to issue seven Lord of the Rings themed 50p coins over the next three years, timed around the anniversaries of all three films, with collectors able to house the complete set in a bespoke Middle Earth presentation case.

Prices begin at £15, while precious metal and limited edition versions are also expected to attract significant interest from both Royal Mint collectors and Tolkien fans alike.

It has a 22 carat gold version available for £2,420, with a limited run of 100. 

Will these grow in value in the future? 

In my view, this has all the hallmarks of a modern collectable that people will look back on very fondly. 

The releases that tend to endure are rarely random. They usually combine a genuinely innovative feature, a globally recognised franchise and a moment in popular culture that people emotionally connect with. This coin ticks every one of those boxes.

The fact this is the first UK coin to use caustic technology immediately gives it significance within modern Royal Mint history, while the enduring popularity of The Lord of the Rings: The Fellowship of the Ring gives it an audience far beyond traditional coin collectors. 

Add in the fact that this is the beginning of a seven coin series and you have exactly the sort of release that collectors tend to hold onto rather than sell on quickly.

Importantly, it also feels memorable. People will remember the hidden Eye of Sauron effect in the same way collectors remember the first colourised coins or standout commemorative releases that genuinely felt different when they launched.

And speaking personally, as a 50p collector myself, I already know exactly where these will sit in my collection.

My precious, indeed.

- 

Dan Hatfield is This Morning's money-making expert and resident pawnbroker. He is an international specialist in antiques, jewellery, diamonds and collectibles.

He writes This is Money's Modern Treasures column and is after your items and collections for valuations.

Please send in as much information as possible, including photographs, to: editor@thisismoney.co.uk with the email subject line: Modern Treasures