The Crown Jewels: Which Crystals and Gems Are Actually in There

The First Time I Saw Them

I remember standing in a slow-moving line inside the Tower of London, shuffling past display cases with my neck craned, when the room opened up into the Jewel House. The lights dimmed. The crowd hushed. And there they were—sitting on velvet, behind inches of bulletproof glass, catching every photon the spotlights threw at them.

I'd seen diamonds before. Sapphires, rubies, emeralds—sure, in jewelry store windows and museum exhibits across Europe. But nothing prepared me for the sheer density of color in the British Crown Jewels. It wasn't just one spectacular gem. It was hundreds of them, crammed into objects that looked almost too ornate to be real.

What struck me most wasn't the size of any single stone. It was the accumulation. Generations of monarchs, spanning nearly a thousand years, each adding their own contributions to this collection. I left the Tower that afternoon with one question I couldn't shake: what exactly is in there, and where did all of it come from?

Three years of reading later, I have a somewhat messy answer. The Crown Jewels are not a single cohesive collection assembled by a master curator. They're a patchwork—part inheritance, part diplomacy, part war spoils, and part colonial extraction. And the stones themselves tell that story better than any history book.

St Edward's Crown: 444 Stones and One Very Specific Purpose

St Edward's Crown is the one you see at the exact moment of coronation. It's placed on the new monarch's head for maybe sixty seconds before being swapped out for the lighter Imperial State Crown. Charles III wore it for about that long in May 2023.

That brief appearance belies the crown's complexity. Made in 1661 for Charles II (the original was melted down under Oliver Cromwell, because Puritans), the solid gold frame weighs 2.23 kilograms. Set into it are 444 precious and semi-precious stones: rubies, sapphires, amethysts, topazes, garnets, peridots, zircons, and spinels. The exact breakdown shifts depending on which source you consult, but the number 444 is what the Royal Collection itself publishes.

The stones aren't arranged by type or origin. They're arranged by aesthetic impact—bunches of red next to flashes of blue, white diamonds scattered throughout to catch light. Looking at photographs, it reads less like a systematic collection and more like a medieval painter's palette.

Many of these stones were repurposed from older royal regalia. When Charles II commissioned the new crown after the Restoration, the Crown Jeweller, Robert Viner, pulled stones from the royal treasury that had survived Cromwell's purge. Some of the garnets and sapphires in St Edward's Crown may date back to the 11th century, though proving that is basically impossible without destructive testing that no one will ever permit.

The Imperial State Crown: Where Things Get Interesting

The Imperial State Crown is the workhorse of the collection. It's the one worn at the State Opening of Parliament, the one in every official portrait, the one most people picture when they hear "crown." Queen Elizabeth II famously kept it on a cushion beside her during a 2018 BBC documentary while describing its weight.

And it contains some of the most storied individual gems in the world.

The Cullinan II Diamond

Sitting front and center, mounted below the Black Prince's Ruby, is a cushion-cut diamond weighing 317.4 carats. This is the Cullinan II, sometimes called the Second Star of Africa. It came from the original Cullinan rough—a 3,106-carat diamond discovered in 1905 at the Premier Mine near Pretoria, South Africa. At the time, it was the largest gem-quality diamond ever found.

The Transvaal government (then a British colony) presented the rough stone to King Edward VII on his 66th birthday in 1907. Joseph Asscher of Amsterdam—whose family firm still cuts famous diamonds today—spent months studying the stone before cleaving it. The Cullinan I (530.2 carats) went into the Sovereign's Sceptre. The Cullinan II (317.4 carats) was set into the Imperial State Crown. The remaining 102 smaller stones were distributed among other pieces of royal jewelry.

South Africa has periodically requested the return of the Cullinan diamonds. The British position, stated through Buckingham Palace, is that the stones were a legitimate gift. The South African position is that a gift extracted under colonial rule doesn't count. The debate hasn't been resolved and probably won't be in our lifetimes.

The Black Prince's Ruby (Which Is Not a Ruby)

Here's the detail that surprised me the most when I first looked into this: the Black Prince's Ruby, the most famous red stone in the entire collection, is not a ruby at all. It's a spinel.

Spinel and ruby are chemically different minerals. Ruby is corundum (aluminum oxide with chromium). Spinel is magnesium aluminate. They look nearly identical to the naked eye—both can be deep red, both have high refractive indices, both have been confused with each other for centuries. In fact, before modern gemology, almost every large "ruby" in European royal collections turned out to be spinel on closer inspection.

The Black Prince's "Ruby" weighs approximately 170 carats and is slightly cabochon-cut with a small drill hole through one end, suggesting it was once worn as a pendant. Its recorded history starts in the 14th century. Edward of Woodstock—the Black Prince—allegedly received it from Pedro of Castile in 1367 as payment for military assistance. Henry V supposedly wore it at the Battle of Agincourt in 1415, set into his battle helmet, where it saved him from a blow that would have cracked his skull.

The battle-helmet story is probably embellishment. The stone's presence in English hands by the late 1300s is not disputed. It's been in the Imperial State Crown since the version made for Queen Victoria in 1838.

The Stuart Sapphire

Mounted on the back of the crown (opposite the Cullinan II) is the Stuart Sapphire, an oval-shaped blue stone weighing about 104 carats. Its history is entangled with the Jacobite succession—the line of Stuart claimants who refused to accept the Hanoverian succession after 1714.

James II took the sapphire with him when he fled to France during the Glorious Revolution of 1688. It passed through various Stuart descendants for over a century before being sold by Henry Benedict Stuart, the Cardinal Duke of York, to George III in 1807. The irony of a Stuart loyalist selling the family's most famous gem to a Hanoverian king is the kind of historical twist that no novelist would dare invent.

The sapphire likely originated in Sri Lanka or Myanmar, though no definitive provenance exists for stones of this age.

The Sovereign's Sceptre: 530 Carats at the Top

If the Imperial State Crown is the workhorse, the Sovereign's Sceptre with Cross is where the biggest stone lives. At the very top, cradled in a golden structure designed to maximize its visual impact, sits the Cullinan I—530.2 carats of nearly flawless diamond.

That number is hard to contextualize. The Cullinan I is the largest clear-cut diamond in the world. It's about the size of a golf ball. It weighs more than the next three largest cut diamonds combined. When George V had it set into the sceptre in 1910, the Royal Goldsmiths had to reinforce the sceptre's structure just to hold it.

The sceptre itself dates to 1688, commissioned for James II. The Cullinan I was added later, in 1910, specifically for the coronation of George V. The original top of the sceptre was removed and replaced with the elaborate mounting that holds the diamond today.

There's a quiet detail about the sceptre that I find more moving than the diamond itself: during coronations, the monarch holds it in their right hand. It's one of the last physical objects a new ruler touches before the crown goes on. Five centuries of English and British monarchs have gripped that same gold rod. The Cullinan I, for all its spectacle, is just the most recent occupant of a position that once held a much smaller stone.

Where Did These Stones Actually Come From?

This is the question that makes the Crown Jewels uncomfortable for some people. The honest answer is: mostly from colonized or semi-colonized territories, acquired through a mixture of diplomacy, trade, conquest, and outright seizure.

The Cullinan diamonds came from South Africa during the period of British colonial rule. The Koh-i-Noor diamond, famously part of the Crown Jewels until it was moved to the Queen Mother's Crown (and now set in a new crown for Queen Camilla), came from India and was surrendered to the British after the Anglo-Sikh Wars in 1849. India, Pakistan, Afghanistan, and Iran have all claimed ownership of the Koh-i-Noor at various points. The British position is that it was legally ceded under the Treaty of Lahore.

The Black Prince's Ruby (spinel) has a murkier origin. Spain is one candidate—the 14th-century connection through Pedro of Castile is the strongest documented link. But large red spinels were also mined in what is now Tajikistan (the Badakhshan mines) and Myanmar. Without modern gemological analysis of the stone itself, the exact source remains speculative.

Sapphires in the collection, including the Stuart Sapphire, most likely came from Sri Lanka (Ceylon) or Myanmar—both major sapphire sources historically controlled or influenced by European colonial powers. Rubies would have come primarily from Myanmar's Mogok valley, with some possibly from Thailand or Afghanistan.

The semi-precious stones in St Edward's Crown—the amethysts, topazes, garnets, peridots—are geographically more diverse but tend to follow colonial trade routes. Peridot from the Red Sea island of Zabargad (controlled by the Ottoman Empire when many of these stones entered European markets). Topaz from Brazil (Portuguese colonial trade). Amethysts from Siberia and Uruguay.

The Contention That Won't Go Away

In recent years, several countries have escalated their demands for the return of specific gems. India has been the most vocal about the Koh-i-Noor. South Africa has raised questions about the Cullinan diamonds. Nigeria has inquired about the Benin Bronzes (not gemstones, but part of the same broader restitution debate).

The arguments on both sides are well-rehearsed. The British government maintains that the objects were acquired legally under the laws and norms of their time, and that returning them would open a Pandora's box of competing claims. The claimant nations argue that colonial-era transactions were inherently coercive and that legal frameworks imposed by colonizers shouldn't legitimize the taking of cultural patrimony.

I'm not going to resolve that debate here. What I find interesting is how the gems themselves resist easy categorization. The Black Prince's "Ruby" has been in English hands since the 1360s. At what point does a contested object become part of the claiming nation's heritage? Five hundred years? Seven hundred? The answer depends heavily on whether you're the country that holds it or the country that lost it.

What These Stones Are Actually Worth

If you asked a gemologist to appraise the Crown Jewels at market value, you'd get a number in the low billions of dollars, depending on how you value historical provenance versus raw carat weight. The Cullinan I alone, at 530 carats and D-color flawless, would command extraordinary prices at auction—though no auction house has ever handled a stone of that significance, so the estimate is largely theoretical.

But here's what I've come to believe after spending far too long reading about these objects: their market value is the least interesting thing about them.

A 317-carat diamond is impressive. But a 317-carat diamond that was pulled from the earth in colonial South Africa, presented to an English king, cut by a family firm that's still in business, set into a crown that has been worn by every British monarch for over a century, and is now the subject of an unresolved international restitution debate—that's not a gemstone. That's a compressed narrative of empire, craft, politics, and time.

The same goes for the spinel that was mistaken for a ruby for six hundred years. The Stuart Sapphire that outlived the dynasty it was named after. The 444 stones in St Edward's Crown, some of which may have seen the coronation of English kings whose names we've mostly forgotten.

When I stood in front of that glass case at the Tower of London, I didn't see billions of dollars. I saw a family's obsessive, centuries-long project of accumulation—beautiful, morally complicated, and impossible to replicate. No one is mining 3,000-carat diamonds anymore. No one is presenting foreign rulers with spinels as thank-you gifts for winning wars. The era that produced the Crown Jewels is over, and that's part of what makes them fascinating.

They're not just crystals and gems. They're time capsules. And like all time capsules, they contain as much ugliness as beauty. The point isn't to admire them uncritically or to demand their dismantling. The point is to look at them honestly and understand what they actually are: objects that carry the full weight of the history that made them.