Diamonds are dug out of the ground. Sapphires are mined. A pearl is the only gem grown by a living animal, and it shines without a jeweller ever cutting or polishing it.
That one fact has made pearls the most fought-over treasure in history. They've been dropped into a queen's drink to win a bet, chewed by a film star's puppy, carried across oceans, auctioned for millions and, according to one famous New York story, swapped for an entire mansion.
And some of the most celebrated pearls ever found didn't come from a tropical lagoon at all. They came from rivers right here in Scotland.
Read to the very end for the necklace that reportedly bought a mansion on Fifth Avenue.
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Forget the grain of sand
Most of us learned at school that a pearl starts with a grain of sand. It's a lovely story, but it's mostly a myth. Natural pearls usually begin with something much smaller, like a tiny parasite or a speck of the shellfish's own tissue that ends up trapped where it shouldn't be.
The animal can't push it out, so it does something clever. It wraps the intruder in nacre, the same shimmering material that lines the inside of its shell, and it keeps on wrapping it, layer after layer, sometimes for years.
Under a microscope, nacre looks like a brick wall: countless microscopic plates of calcium carbonate stacked up and held together by a natural protein. That brickwork is the reason pearls are far tougher than they look. Engineers have spent years studying nacre to help design stronger materials. It's also the secret of their glow. Light slips between those ultra-thin layers and bounces back out, which is why a good pearl seems to shine from the inside instead of just reflecting light like glass.
🐚 Natural pearls form completely by chance. Divers could open huge numbers of shells before finding a single pearl worth wearing, which is why, for most of history, pearls were treasures for royalty.
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The queen who drank a pearl
The most famous pearl story of all comes from ancient Egypt. According to the Roman writer Pliny the Elder, Cleopatra bet Mark Antony that she could host the most expensive banquet in history.
When the food arrived and looked fairly ordinary, Antony thought he'd won. Then Cleopatra took off one of her enormous pearl earrings, dropped it into a cup of vinegar, waited for it to dissolve and drank it.
People have been trying the trick in kitchens and labs ever since, with mixed results, and historians still argue about whether it ever happened. But the story has survived for two thousand years for one simple reason. It showed the whole Roman world that a single pearl could be worth more than a feast fit for an emperor.
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Scotland's secret pearl rivers
You don't need to go to the tropics to find pearls. For centuries, Scotland's rivers were famous for them. Freshwater mussels in rivers like the Tay and the Spey produced soft, glowing pearls in white, pink and even lilac, and Scottish pearls were traded right across Europe.
The Roman historian Suetonius even claimed that pearls were one of the reasons Julius Caesar was tempted to invade Britain in the first place.
The most famous Scottish pearl of modern times was found in 1967 by a pearl fisher called Bill Abernethy in the River Tay. The Abernethy pearl, nicknamed "Little Willie", is often described as the finest freshwater pearl ever found in Scotland. Scottish river pearls are also said to be set into the Crown of Scotland, part of the Honours of Scotland at Edinburgh Castle.
💎 Today the freshwater pearl mussel is a protected species in the UK, so new Scottish river pearls can't be fished. That makes the old ones even more special, and it's one reason antique pearl jewellery with a Scottish story behind it is so treasured.
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The noodle shop son who changed everything
By the late 1800s, wild pearl oysters had been fished so heavily that natural pearls were becoming almost impossible to find. Then Kokichi Mikimoto, the son of a Japanese noodle shop owner, had an idea that would change jewellery forever.
He placed a tiny bead inside an oyster to start the process on purpose. The oyster did the rest, coating it in nacre exactly as it would in the wild. In 1893 he produced his first cultured pearls, and within a few decades his pearls were being worn all over the world.
Cultured pearls are real pearls. They grow inside a living oyster in exactly the same way as natural ones, just with a little human help to get things started. Today almost all the pearls you'll see for sale are cultured, which is why a gem that was once only for queens can now be worn every single day.
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Not all pearls are white
Pearls come in a whole rainbow of natural shades, and the colour depends on which shellfish grows them.
🖤 Tahitian pearls grow in the black-lipped oyster, in dark greys, peacock greens and deep aubergine
✨ South Sea pearls grow in the biggest pearl oysters of all, in gold or silvery white, and can be much larger than other pearls
💗 Freshwater pearls grow in mussels, and one mussel can produce dozens of pearls at once, in white, peach, pink and lilac
🌸 Akoya pearls are the classic round white pearls of Japan, famous for their mirror-bright shine
Then there are baroque pearls, the irregular, wonderfully wonky shapes nature sometimes produces, like the big pearls in our rose gold earrings above. For years they were seen as second best. Now they're some of the most sought-after pearls in fashion, because no two will ever be the same.
Renaissance jewellers adored them too. They'd study the shape of a big baroque pearl and turn it into the body of a mermaid, a swan or a dragon, adding gold, enamel and gems around it. Some of those pieces are now treasured museum pieces.
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The film star, the queen and the hungry puppy
La Peregrina, meaning "the wanderer", is one of the most famous pearls in the world. It was found in the Gulf of Panama in the 1500s, became part of the Spanish royal collection, and was given by Philip II of Spain to his bride, Mary I of England. Look closely at her portraits and you can see it hanging at her chest.
Centuries later, in 1969, Richard Burton bought it for Elizabeth Taylor. Not long after, she noticed it was missing from its necklace. In her own telling of the story, she glanced over and saw her puppy chewing on something on the carpet. It was La Peregrina, and it didn't have a mark on it.
When her jewellery collection was auctioned in 2011, La Peregrina sold for almost $12 million. Survived a puppy and still one of the most valuable pearls on earth. So much for pearls being delicate.
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How Coco Chanel made pearls an everyday thing
In the 1920s, Coco Chanel piled long ropes of pearls over simple black dresses and wore them with everything, day and night. She happily mixed real pearls with costume ones, and suddenly pearls weren't something your grandmother kept locked away for weddings. They were the coolest accessory in Paris.
That's still the best way to wear them. A pearl drop with a chunky jumper, pearl hoops with jeans, a dainty pearl necklace with a plain white T-shirt. Pearls look better the more casually you wear them.
In crystal traditions and folklore, pearls are often associated with:
Here are two easy ways to bring that soft glow into your everyday look.
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The jeweller's trick for spotting a real pearl
Here's a test jewellers have used for generations. Gently rub a pearl against the edge of your front teeth. Real pearls, natural or cultured, feel very slightly gritty, like the finest sandpaper, thanks to those tiny layers of nacre. Imitation pearls usually feel completely smooth.
Real pearls also tend to feel cool when you first touch them and then warm up beautifully against your skin. And if you've inherited a strand and you're not sure what you've got, bring it into the shop in Kirkcaldy. We've been in the trade for over 30 years and we're always happy to take a look.
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Pearl FAQs
Are cultured pearls real pearls?
Yes. They grow inside a living oyster or mussel just like natural pearls. The only difference is that a person starts the process.
What month is the pearl birthstone?
June. Alexandrite and moonstone are also June birthstones on modern lists, but pearl is the classic. Pearls are also the traditional gift for a 30th wedding anniversary.
Can I wear pearls every day?
Absolutely. Pearls are tougher than they look, and many jewellers say they look their best when they're worn often. Pop them on after your perfume and they'll keep their glow for years.
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What our customers say
⭐⭐⭐⭐⭐ — June Ewing
"I went into Eloise with a Tahitian pearl I brought back from Tahiti. I wanted the pearl made into a pendant. Louise was amazing at showing me different ways of using my pearl and came up with an exquisite design... I shall cherish this peice forever."
The necklace that reportedly bought a mansion
In 1917, so the story goes, a New York socialite named Maisie Plant fell in love with a double strand of natural pearls at Cartier. The necklace was said to be valued at around a million dollars.
Her husband, the businessman Morton Plant, reportedly made Pierre Cartier an offer: his grand mansion on Fifth Avenue, plus a small amount of cash, in exchange for the pearls. Cartier said yes.
🏛️ The details vary a little depending on who's telling it, but the building is still Cartier's New York flagship today. A Fifth Avenue mansion, bought, so the story goes, with a string of pearls.
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A little bit of ocean magic
From a speck inside a shell to a treasure worth a mansion, every pearl has a story. Browse our pearl pieces online or come and see their glow in person in Kirkcaldy.
Love treasures from the sea? Read about the sea treasure the Romans believed could protect their children.
Dreaming of something completely one of a kind? Our workshop can make it happen. See our bespoke commission work.
Visit or contact Eloise Jewellery
📍 Eloise Jewellery, 156 High Street, Kirkcaldy, Fife, Scotland, KY1 1NQ📞 01592 646340 · ✉️ eloisejewellery@hotmail.co.uk
🕒 Monday–Saturday: 9:30am–5:30pm
Please note: the spiritual properties described in this article come from crystal traditions and folklore. They are not scientifically proven and are not a substitute for medical advice.