After their stunning display at the coronation, the crown jewels are once again on display

After their glittering role at the coronation, the gems that captivated the world have found a new home – perhaps fitting for a king and queen, but also for an audience wanting to see more.

The Crown Jewels will return to the Jewel House in the Tower of London, where a four-year restoration will be unveiled today.

The multi-million pound high-security refurbishment means the 20,000 people who visit the Crown Jewels every day can get an even closer look at the Crown Jewels, from every angle.

And while the truth is I had few complaints about the old display, this new take is a revelation.

The crown jewels that Charles III. wore at his coronation on May 6th are now on display in the renovated Jewel House in the Tower of London

The multi-million pound refurbishment of the Jewel House is attended by 20,000 people a day

Queen Mary’s crown with a replica of the controversial Koh-i-Noor diamond – on display in the new exhibition. The Koh-i-noor was removed from Queen Mary’s crown for May 6th and replaced with stones cut from the Cullinan diamond

The ruler’s scepter with cross has been used at every coronation since Charles II in 1661. At its top is a stone made from the Cullinan diamond

The late Queen Mother’s crown, here featuring the actual Koh-i-Noor rather than a replica, along with other gemstones

The jewels are more clearly visible and in a much clearer context, while the many audiovisual additions make for a moving experience.

The controversial Koh-i-Noor diamond is here – diplomatically barred from a consort’s crown for the first time on May 6th.

So does the incomparable Cullinan, which 130 years after its discovery in South Africa is still the largest diamond ever unearthed.

It was given to Edward VII in 1907 and spectacularly took center stage at the coronation. Huge chunks of cut diamonds featured in the scepter, the imperial crown of state, and the newly fitted consort’s crown (minus the Koh-i-Noor) worn by Camilla.

The remodeling was sponsored, among others, by Garrard, the first official crown jeweler and creator of most of the crowns and jewels in the Treasury.

For the first time we see the frames of the state crowns created for George I, George IV and Queen Victoria.

It is impossible not to be impressed by the enormous size of the crown of George IV, who we are told had the most magnificent coronation of all in July 1821.

Another first is the incorporation of an exquisite sapphire – more lonely known as the “Unnamed Sapphire” – which was placed in Queen Victoria’s state crown at her coronation.

As for the controversies, the exhibition is clear: the Koh-i-Noor was ‘taken’ and then given to Queen Victoria (which is the view of the royal collection).

And we see exactly how it was presented to the Queen: set in an exquisitely enamelled bangle on display in the exhibition.

There is also a recreation of the Koh-i-Noor’s original Mughal cut, before Prince Albert had it recut to enhance its shine and suit Western tastes.

Later in the exhibition we see the diamond itself, fought over for centuries, magnificently set in the Queen Mother’s crown.

The Jewel House on Waterloo Block in the Tower of London

King Charles, wearing the Imperial State Crown, and Queen Camilla, wearing Queen Mary’s crown, pictured in the throne room of Buckingham Palace after the coronation

The exhibition includes the sword worn by the Lord President of the Council, Penny Mordaunt, at the coronation

We see how the original medieval jewels (dating back to the coronation of King Edgar in 973) were destroyed by Oliver Cromwell in 1649.

The coronation spoon, the only remaining item, is on display, as is a Commonwealth-era coin made from the melted gold of the ancient items.

Many of the regalia used during the coronation ceremony are also on display – including another star of the coronation: the 5 pound sword of state, known to be wielded by Speaker of the House of Commons and Lord President of the Council, Penny Mordaunt.

This might prove to be one of the most popular items out there.

• The new Jewel House exhibition opens today, Friday 26th May and is included in general admission.

• Josie Goodbody’s novel The Cullinan Diamond Connection: A Jemima Fox Mystery will be available later this year.