Petra Diamonds Weighs Sale as Diamond-Market Pressures Mount

 

Strategic review highlights the financial pressure facing one of Africa’s best-known natural diamond producers

Petra Diamonds has launched a strategic review that could ultimately lead to the sale of some or all of its assets, as the company faces continuing liquidity pressures, weak natural diamond prices and significant operational challenges at its Finsch mine in South Africa.

The London-listed diamond producer announced on 1 October that, following discussions with key stakeholders including its first and second lien creditors, it would examine all available options for addressing its near-term liquidity requirements. These options include a potential sales process involving the company’s assets. Petra is also in the process of appointing a financial adviser to assist with the review.

At the same time, José Manuel Vargas stepped down as chairman and a director of the company. Lerato Molebatsi has been appointed interim chair.

The developments are significant because Petra is not simply another diamond producer. Over almost three decades, the company has built a portfolio around some of the world’s most historically important diamond mines.

From junior explorer to major diamond producer

Petra Diamonds was first admitted to trading on London’s AIM market in April 1997 with a market capitalisation of approximately £8.75 million. It subsequently moved to the Main Market of the London Stock Exchange in December 2011.

The company’s growth was driven in large part by acquiring diamond assets that were considered non-core by larger mining groups, including De Beers.

Among its most important acquisitions was the Cullinan Mine in South Africa, acquired by Petra in stages from 2008. In 2011, Petra acquired a majority interest in Finsch, one of South Africa’s most significant diamond mines.

Petra subsequently became associated with an extraordinary collection of diamond-producing assets and some remarkable stones.

The Cullinan Mine is perhaps the most famous. Originally known as the Premier Mine, it produced the 3,106-carat Cullinan diamond, the largest gem-quality rough diamond ever discovered. The stone was ultimately cut into several important diamonds, including the Great Star of Africa and the Second Star of Africa, both of which form part of the British Crown Jewels.

Cullinan has also produced some of the world’s most notable blue diamonds, including a Type IIb blue diamond that Petra sold in 2021 for US$40.2 million, equivalent to more than US$1 million per carat.

Finsch has its own remarkable history. The mine has been operating since 1967 and is known for producing commercial-quality diamonds, including larger stones above five carats, as well as occasional exceptional diamonds exceeding 50 carats. Petra has operated the mine since 2011.

Petra’s history also includes the Williamson mine in Tanzania, famous for the Williamson Pink, a 54-carat rough pink diamond discovered in 1947. The polished stone became a gift to Princess Elizabeth, later Queen Elizabeth II. Petra sold its interest in Williamson in 2025 as part of its strategy to streamline its portfolio.

Finsch becomes a major pressure point

The immediate financial problem, however, is centred on Finsch.

The mine entered business rescue in May 2026 and production was subsequently suspended. Petra has said that, despite strong operating performance, the mine’s high proportion of smaller diamonds, combined with the strength of the South African rand and exceptionally difficult market conditions, made the operation economically unsustainable in its existing form.

Petra reported consolidated net debt of approximately US$322 million at 30 June 2026, compared with US$298 million three months earlier. The company said its cash position had become increasingly constrained by weaker diamond prices and the ring-fencing of cash associated with the Finsch business-rescue process.

The company has already secured additional short-term working capital support from its senior lender, including a R300 million facility, while discussions around a broader refinancing have continued.

The latest strategic review therefore represents a further step in Petra’s efforts to protect liquidity and determine how its remaining assets can be structured for the future.

The wider natural diamond squeeze

Petra’s difficulties should also be viewed within the much broader disruption experienced by the natural diamond industry.

Diamond producers, manufacturers, wholesalers and retailers have faced a combination of weaker consumer demand, economic uncertainty, excess inventory, changing purchasing patterns and increased competition from laboratory-grown diamonds.

The result has been substantial pressure on rough diamond prices and on the economics of mining.

Petra’s own history illustrates the dramatic change in the industry. The company produced more than 4.6 million carats in 2018, whereas its current portfolio is considerably smaller following the disposal of several assets.

The company has also undertaken cost reductions, portfolio rationalisation and debt restructuring in an effort to adapt to the new market environment.

For the natural diamond industry, however, there is an important distinction between falling production and falling demand.

A natural diamond supply reset?

Global diamond production has been falling sharply as producers respond to weaker economics. Industry analyst Paul Zimnisky has pointed to the possibility that declining mine supply could eventually help rebalance the market.

Lower production may gradually remove some of the excess supply that has weighed on rough diamond prices. But that does not guarantee an immediate recovery. The industry still needs sustainable consumer demand, healthy inventories and prices that allow mines to operate profitably.

For companies such as Petra, the timing is critical.

A reduction in global mine supply could ultimately provide support for natural diamond prices, but producers carrying substantial debt cannot necessarily wait indefinitely for a future market recovery.

The changing diamond landscape

The difficulties facing Petra also highlight an important reality about diamonds: a diamond mine is a finite natural resource, and maintaining production is extraordinarily capital intensive.

Laboratory-grown diamonds have introduced another layer of competition into the lower and middle sections of the jewellery market. Unlike natural diamonds, laboratory-grown stones can be manufactured in virtually unlimited quantities, meaning their economics are fundamentally different from a scarce geological resource that can take billions of years to form.

This distinction is increasingly important when considering the long-term value proposition of natural diamonds.

Natural diamonds are not simply manufactured products. They are geological rarities, with their supply ultimately constrained by the number of economically viable deposits that exist on Earth.

The challenge for the natural diamond industry is therefore not simply producing diamonds. It is maintaining a balance between scarcity, consumer demand, mine economics and market confidence.

What happens next?

Petra’s strategic review does not mean that a sale will necessarily occur. The company has said that all potential avenues for addressing its liquidity requirements are being considered, with any outcome dependent on the review and discussions with stakeholders.

Possible outcomes could include asset transactions, further financing, restructuring or a broader corporate transaction.

Whatever the eventual outcome, Petra’s situation is a reminder of how dramatically the natural diamond industry has changed.

A company that grew from a small junior explorer in 1997 into the owner and operator of some of the world’s most celebrated diamond assets is now having to reconsider its structure in response to one of the most challenging periods the modern diamond industry has experienced.

For DCLA, the story also reinforces an important point: the rarity and provenance of a natural diamond remain fundamental to understanding what makes exceptional diamonds different from mass-produced alternatives.

From the Cullinan diamond and historic blue diamonds to the Williamson Pink and the exceptional stones recovered at Finsch, Petra’s history is intertwined with some of the most important diamonds ever discovered.

The question now is whether the next chapter of that history will be written under Petra’s ownership — or by a new generation of owners.

An exceptionally rare 8.03 carat blue diamond is expected to attract significant attention

 

An exceptionally rare 8.03 carat blue diamond is expected to attract significant attention when it goes to auction in London, with an estimate of up to £2 million (approximately US$2.64 million).

The centre stone is a pear modified brilliant-cut Fancy Light Blue diamond, graded VS2 clarity by the Gemological Institute of America (GIA). It is mounted within concentric borders of round brilliant-cut pink and white diamonds, with additional round brilliant-cut white diamonds set into the shoulders.

According to Elmwood’s, the specialist auction house handling the sale, it is only the third blue diamond weighing more than eight carats ever offered at auction in the United Kingdom.

The diamond carries an estimate of £1.5 million to £2 million (approximately US$1.98 million to US$2.64 million) and is being sold on behalf of a collector in Glasgow.

The two previous examples include the legendary 70.21-carat Idol’s Eye, sold by Christie’s in London in 1865, and the Wittelsbach Diamond, sold by Sotheby’s in London in 2008.

At 8.03 carats, the new stone would also rank as the third-largest blue diamond sold at auction in British history, according to Elmwood’s. It is also described as the largest pear brilliant-cut blue diamond ever offered at auction in the UK.

What Makes a Diamond Blue?

Natural blue diamonds are among the rarest coloured diamonds in the world.

The blue colour is primarily caused by the presence of boron within the diamond’s crystal structure. Diamonds are composed almost entirely of carbon, but during their formation deep within the Earth, tiny amounts of other elements can become incorporated into the crystal lattice.

When boron atoms replace some carbon atoms, they alter the way the diamond absorbs and interacts with light. The boron absorbs portions of the visible spectrum, allowing the characteristic blue colour to dominate the diamond’s appearance.

DCLA explains that the distinctive blue colour of natural blue diamonds is caused by boron impurities in the crystal structure, with the amount and distribution of boron influencing the resulting colour.

DCLA’s recent article on the world’s most valuable coloured diamonds similarly explains that only a few boron atoms replacing carbon during crystal growth can produce colours ranging from pale blue to vivid blue.

The Gemological Institute of America also identifies Type IIb diamonds as a rare variety containing boron within the crystal structure, which can impart a blue colour.

Boron and a Diamond’s Reaction to UV Light

There is another fascinating aspect of diamond science: fluorescence.

When certain diamonds are exposed to ultraviolet radiation, including the UV component of sunlight or a black light, they can emit visible light. This phenomenon is known as fluorescence.

DCLA explains that diamond fluorescence is caused by trace elements and microscopic structures within the diamond. The most common fluorescence colour is blue, although other colours can occur.

The Gemological Institute of America describes fluorescence as visible light emitted by a diamond when it is exposed to invisible ultraviolet radiation. More than 95% of fluorescent diamonds in GIA’s data show blue fluorescence, although yellow, white and other colours can occasionally occur.

This creates an important distinction:

A blue diamond is not necessarily a diamond that fluoresces blue.

The permanent blue body colour of a natural blue diamond is primarily associated with boron within its crystal structure. Fluorescence, by contrast, is the visible reaction produced when the diamond is exposed to UV light.

A colourless diamond can therefore fluoresce blue under a black light, while a naturally blue diamond does not necessarily fluoresce.

DCLA specifically makes this distinction when explaining blue-white diamonds: blue diamonds have a natural blue body colour caused by boron, whereas blue-white diamonds are colourless or near-colourless diamonds that display blue fluorescence under appropriate lighting.

An Important Detail About This Diamond

This distinction is particularly interesting in the case of the 8.03-carat auction diamond.

Although its natural blue body colour is associated with boron, the published information accompanying the stone reports no fluorescence.

That means the diamond’s blue appearance should not be confused with the blue glow sometimes seen when diamonds are placed under ultraviolet or black light.

This is an excellent example of why gemological examination involves considerably more than simply observing a diamond’s colour. Laboratories can examine a diamond’s fluorescence, spectroscopy, crystal structure and other characteristics to understand the factors responsible for its appearance.

DCLA’s laboratory uses advanced analytical technology, including DiamondView™ fluorescence imaging, which can reveal fluorescence patterns and growth structures useful in distinguishing natural and laboratory-grown diamonds.

Blue Diamonds and the Deep Earth

The story of natural blue diamonds goes even deeper.

Research discussed by GIA has shown that many natural blue, boron-bearing diamonds originated at extraordinary depths within the Earth’s mantle. Their boron is believed to have been carried deep into the Earth through geological processes involving ancient oceanic crust.

This makes large natural blue diamonds remarkable not only because of their rarity and beauty, but because they can provide scientists with a glimpse into parts of the Earth that are otherwise inaccessible.

Fluorescence Is Not Phosphorescence

There is also a subtle but important scientific distinction between fluorescence and phosphorescence.

Fluorescence occurs while the diamond is being exposed to UV light and normally stops almost immediately when the UV source is removed.

Phosphorescence is different: the diamond can continue to emit visible light after the UV source has been switched off.

DCLA explains that phosphorescence involves energy remaining trapped within the diamond and being released over a longer period. Boron can also play a role in the optical behaviour of certain diamonds exhibiting phosphorescence.

This distinction is particularly interesting in blue diamonds. GIA research has documented both blue and red phosphorescence in natural Type IIb, boron-bearing diamonds.

A Remarkable Combination of Rarity and Science

The 8.03-carat diamond demonstrates why exceptional coloured diamonds fascinate both collectors and gemmologists.

Its blue body colour begins at the atomic level, with tiny quantities of boron incorporated into the diamond’s crystal structure billions of years ago. That microscopic difference can transform an otherwise colourless carbon crystal into one of the world’s rarest and most valuable gemstones.

And while this particular diamond reportedly does not fluoresce, the broader science of fluorescence provides another remarkable insight into the way diamonds interact with invisible ultraviolet radiation.

From boron and body colour, to fluorescence and phosphorescence, the science behind coloured diamonds is every bit as fascinating as the gemstones themselves.

Further Reading from DCLA

DCLA — Blue Diamond
Read DCLA’s Blue Diamond guide

DCLA — Fluorescence in Diamonds
Read DCLA’s guide to diamond fluorescence

DCLA — Blue-White Diamonds
Read DCLA’s Blue-White Diamond guide

DCLA — Phosphorescence
Read DCLA’s explanation of phosphorescence

DCLA — Diamond Education
Explore DCLA Diamond Education

DCLA — Our Laboratory & Technology
Explore DCLA’s laboratory and DiamondView™ technology

Independent Scientific References

The Gemological Institute of America (GIA) has also published extensive research on natural blue, boron-bearing diamonds and their unusual optical properties.

GIA — Where Do Blue Diamonds Come From?

GIA — About Diamond Fluorescence

The Art of Contrast: Why Mixing Coloured Diamonds Creates Extraordinary Jewellery

 

For centuries, white diamonds have been regarded as the ultimate symbol of elegance and timeless beauty. Today, however, the world’s leading jewellery designers are embracing a more artistic approach combining white diamonds with rare coloured diamonds to create striking pieces that are as unique as they are valuable.

From delicate pink diamond halos surrounding a brilliant white centre stone to vivid yellow diamonds framed by soft pink accents, the thoughtful use of contrasting colours can transform an already beautiful diamond into an exceptional work of art.

The result is jewellery that is not only visually captivating but often far more distinctive than traditional all-white diamond designs.

Colour Creates Emotion

The human eye is naturally drawn to contrast.

Artists have understood this for centuries, using complementary colours to create depth, balance and visual impact. Jewellery designers apply the same principles when working with diamonds.

A perfectly colourless diamond surrounded by a halo of natural pink diamonds immediately appears brighter and more vibrant. The soft blush tones create warmth around the crisp white centre stone, producing a romantic and luxurious appearance that cannot be achieved with white diamonds alone.

Similarly, a rich yellow diamond surrounded by pink diamonds creates a dramatic contrast. The warmth of the yellow is enhanced by the cool undertones of the pink, allowing each colour to appear richer and more saturated.

Rather than competing with one another, the colours work together to produce greater visual intensity.

The Rise of Coloured Diamond Combinations

While coloured diamonds have always been prized by collectors, improvements in jewellery design and precision manufacturing have encouraged designers to use them in increasingly creative ways.

Some of today’s most sought-after combinations include:

• A colourless diamond framed by a halo of natural pink diamonds.
• Fancy Yellow diamonds surrounded by Argyle pink diamonds.
• Fancy Intense Yellow centre stones with white diamond halos.
• White diamonds accented with blue or champagne diamonds.
• Pink diamonds paired with white pavé settings.
• Three-stone rings featuring contrasting diamond colours.
• Alternating white and coloured diamonds in eternity bands.

Each combination creates its own personality, allowing jewellery to become an expression of individual style rather than simply following tradition.

Pink Diamonds: Small Stones with Extraordinary Impact

Natural pink diamonds occupy a unique position within the diamond world.

Even very small pink diamonds possess remarkable rarity, particularly those originating from Australia’s now-closed Argyle Mine. Their limited availability has made them highly desirable among collectors and designers alike.

A halo of pink diamonds surrounding a larger white diamond allows jewellers to showcase this rarity without requiring a large pink centre stone.

The effect is remarkable.

The pink diamonds add warmth and sophistication while visually enhancing the brilliance of the colourless centre diamond.

Because the halo consists of numerous carefully matched stones, the overall impression is one of richness and refinement.

Yellow Diamonds Come Alive with Contrast

Yellow diamonds are among the most popular naturally coloured diamonds available today.

When used as the centrepiece of a ring, they radiate warmth and vibrancy. However, surrounding a yellow diamond with carefully selected pink diamonds introduces an entirely new dimension.

The soft pink tones gently frame the yellow centre, making its colour appear deeper and more saturated. At the same time, the yellow diamond provides a striking focal point against the delicate pink border.

Many luxury jewellery houses have embraced this combination because it creates an appearance that is simultaneously elegant, modern and unmistakably distinctive.

More Than Beauty, A Celebration of Rarity

Combining different coloured diamonds is not simply a design trend.

It is often a celebration of rarity.

Natural fancy coloured diamonds account for only a very small percentage of all diamonds recovered worldwide. Finding matching stones with similar colour intensity, clarity and size requires exceptional expertise.

Every carefully matched halo represents countless hours of diamond selection.

The more precisely the colours complement one another, the more harmonious and valuable the finished piece becomes.

The Importance of Colour Matching

Creating a successful coloured diamond design involves far more than selecting attractive stones.

Professional jewellers carefully consider:

• Colour hue
• Colour intensity
• Tone
• Saturation
• Diamond size
• Cut precision
• Overall symmetry

Even slight variations between pink diamonds can affect the appearance of a halo.

Likewise, white accent diamonds must be matched for colour and brilliance to ensure they enhance rather than distract from the centre stone.

This meticulous attention to detail is what separates exceptional jewellery from ordinary jewellery.

Precious Metals Complete the Design

The choice of metal plays an equally important role.

Platinum and white gold enhance the brilliance of colourless diamonds and provide a contemporary appearance.

Yellow gold intensifies the warmth of yellow diamonds while offering a classic, timeless aesthetic.

Rose gold has become increasingly popular for pink diamond jewellery, complementing the delicate blush tones and creating a seamless flow of colour throughout the design.

Some of the most sophisticated creations combine multiple precious metals, allowing each section of the ring to highlight a different coloured diamond.

A New Era of Personal Expression

Today’s clients are increasingly seeking jewellery that reflects their individuality.

Mixing coloured diamonds allows designers to create bespoke pieces that cannot be replicated simply by increasing diamond size or carat weight.

Whether choosing a white diamond embraced by a halo of rare pink diamonds or a radiant yellow diamond accented with white and pink stones, these combinations create jewellery that tells a story through colour, contrast and craftsmanship.

Beauty Enhanced by Contrast

The finest jewellery is rarely about excess it is about balance.

The careful pairing of white, pink and yellow diamonds demonstrates how contrast can enhance brilliance, intensify colour and elevate an already beautiful design into something truly extraordinary.

As coloured diamonds continue to capture the imagination of collectors and jewellery lovers around the world, their thoughtful combination with traditional white diamonds is redefining modern luxury.

When selected with care and expertly matched, contrasting diamond colours do more than create visual impact they create timeless pieces whose beauty lies not only in the rarity of the individual diamonds, but in the harmony they achieve together.

Source: DCLA

The Heart of Eternity Diamond: The Extraordinary Blue Diamond That Could Redefine Rarity

 

Among the world’s most exceptional gemstones, few diamonds capture the imagination quite like the Heart of Eternity Diamond. A 27.64 carat Fancy Vivid Blue heart shaped diamond, this extraordinary gem represents one of the rarest combinations in the diamond world: exceptional size, intense colour, remarkable clarity, and a story filled with mystery, intrigue, and immense value.

Blue diamonds are among the rarest natural diamonds ever discovered. Their colour comes from trace amounts of boron trapped within the diamond crystal structure during formation deep beneath the Earth’s surface. Unlike traditional colourless diamonds, where rarity is often measured by size and clarity, coloured diamonds are judged by the strength and beauty of their colour, with vivid blues commanding extraordinary premiums.

The Heart of Eternity Diamond sits at the highest level of this category, officially graded Fancy Vivid Blue by the Gemological Institute of America (GIA), placing it among the finest blue diamonds ever evaluated.

A Diamond Born from One of the World’s Most Famous Mines

The story of the Heart of Eternity Diamond begins at the legendary Cullinan Diamond Mine in South Africa, formerly known as the Premier Diamond Mine.

This historic mine has produced some of the most important diamonds in history, including the famous Cullinan Diamond, discovered in 1905. The Cullinan Diamond weighed an extraordinary 3,106 carats in rough form and was later cut into nine major diamonds, many of which became part of the British Crown Jewels.

The same geological conditions that created the Cullinan Diamond also produced some of the world’s most valuable blue diamonds, including the Heart of Eternity.

A Gemstone From a Category of Extreme Rarity

At 27.64 carats, the Heart of Eternity is not the largest blue diamond ever discovered, but its combination of size, colour, and shape places it in a category occupied by only a handful of legendary stones.

Natural blue diamonds represent only a tiny fraction of all diamonds mined worldwide. Within that group, stones with a vivid blue colour, significant carat weight, and exceptional quality are almost impossible to replace.

The heart shape adds another layer of uniqueness. While round brilliant diamonds dominate the market for maximum brilliance, a perfectly executed heart shaped diamond requires exceptional rough material and highly skilled cutting to preserve both beauty and weight.

The Mystery Behind the Diamond

The Heart of Eternity Diamond was revealed to the world in the late 1990s after being cut from a much larger rough blue diamond. It became part of the collection of De Beers, which showcased the stone as one of the most remarkable examples of natural blue diamond beauty.

The diamond later attracted significant attention when reports linked it to private ownership and high profile collectors. Like many of the world’s greatest diamonds, its current ownership has remained surrounded by secrecy, adding to its legendary status.

A Value That Could Reach Historic Levels Today

When exceptional blue diamonds appear at auction, they frequently achieve some of the highest prices ever recorded for gemstones.

The famous Blue Moon of Josephine, a 12.03 carat Fancy Vivid Blue diamond, sold for more than US$48 million in 2015, setting a record price per carat at the time.

The Heart of Eternity Diamond is more than twice the size of the Blue Moon of Josephine, while also possessing the highly desirable Fancy Vivid Blue classification. If a diamond of this quality entered the market today, many experts believe it could command a valuation reaching hundreds of millions of dollars.

Why the Heart of Eternity Matters to the Diamond World

The Heart of Eternity Diamond represents more than just a beautiful gemstone. It is a geological miracle, created over billions of years under extreme conditions, then transformed by human craftsmanship into a piece of natural art.

For diamond professionals and collectors, stones like the Heart of Eternity demonstrate why exceptional natural diamonds remain among the world’s most sought after assets. Their rarity cannot be manufactured, their history cannot be replicated, and their value is driven by the simple reality that there are only a few truly exceptional examples in existence.

At DCLA, the study, grading, and understanding of diamonds is built around recognising these unique characteristics. Every extraordinary diamond tells a story, from its formation deep within the Earth to the moment it is revealed as one of nature’s rarest creations.

Geneva Set to Dazzle as Rare Blue Diamonds Headline May Auctions

 

The global diamond market will turn its attention to Sotheby’s and Christie’s this May, as two exceptional blue diamonds each representing the pinnacle of rarity and natural beauty prepare to go under the hammer in Geneva.

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Sotheby’s to Offer 6.03-Carat Fancy Vivid Blue Diamond

A 6.03-carat cushion-shaped fancy vivid blue diamond is expected to achieve up to CHF 9.5 million (approximately USD $12.2 million) at Sotheby’s High Jewellery auction on May 12 in Geneva.

The diamond is graded internally flawless and classified as a Type IIb stone a category that includes some of the rarest and most chemically pure diamonds in the world. Type IIb diamonds are distinguished by the presence of boron, which imparts their highly sought-after blue colour and exceptional optical properties.

This important piece will headline a broader offering of high jewellery from renowned maisons including Van Cleef & Arpels, Bucherer, and Cartier, alongside a curated selection of coloured diamonds and rare gemstones.

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“The Ocean Dream” Returns to Christie’s

Also commanding global attention is the reappearance of the legendary “Ocean Dream,” a 5.50-carat fancy vivid blue-green diamond, set to headline Christie’s Magnificent Jewels auction on May 13 at the Four Seasons Hotel des Bergues in Geneva.

Certified by the Gemological Institute of America, the Ocean Dream holds the distinction of being the largest known fancy vivid blue-green diamond in the world. Its unique hue reminiscent of tropical seawater places it among the rarest colour expressions ever documented in natural diamonds.

Unlike the Type IIb blue offered at Sotheby’s, the Ocean Dream is classified as a Type Ia diamond. While Type Ia stones account for approximately 95% of all natural diamonds, they are rarely associated with such intense and unusual colour saturation, making this specimen an extraordinary anomaly.

The diamond, cut into a distinctive triangular shape, originated from an 11.70-carat rough discovered in Central Africa during the 1990s. It is expected to achieve between CHF 7 million and CHF 10 million (USD $8.9 million to $12.7 million).

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A Stone of Museum-Level Importance

The Ocean Dream first gained international recognition during the 2003 “Splendor of Diamonds” exhibition at the Smithsonian National Museum of Natural History, where it was showcased among eight of the rarest diamonds ever discovered.

Max Fawcett, Global Head of Jewellery at Christie’s, has described the stone as “an exceptional jewel of profound rarity and allure,” underscoring its importance not only within the auction market but also in the broader gemological landscape.

This upcoming sale marks the diamond’s second appearance at auction. It was previously sold by Christie’s in 2014 for CHF 7.7 million, achieving approximately $1.4 million per carat at the lower end of its estimate at the time.

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Market Significance

The simultaneous offering of two world-class blue diamonds each representing different diamond types and colour origins highlights continued strength at the top end of the coloured diamond market. For collectors and investors alike, these stones underscore the enduring appeal of rarity, provenance, and gemological significance.

As Geneva once again becomes the focal point of the high jewellery world, the results of these sales will provide further insight into pricing dynamics for the rarest natural diamonds, particularly as supply remains constrained and global demand for exceptional stones continues to grow.

Source: DCLA