A 6.17-carat fancy pink diamond is expected to fetch up to $1.8m in an online auction.
The Angelina belonged to Willa Dean Lyon, wife of Maj Gen William Lyon, and was named after their granddaughter.
Maj Gen Lyon was a successful businessman and real estate magnate from Southern California who built over 100,000 homes across the US. He died in 2020, aged 97. His wife died last year, aged 92.
The VVS2 oval modified brilliant diamond is set in an 18k white and rose gold ring, with about 1.00-cts of near-colorless diamonds.
It is being sold by Heritage Auctions, based in Dallas, as part of its Holiday Fine Jewelry Signature Auction, which closes on 3 December. The estimate is $1.2m to $1.8m.
According to the Fancy Color Research Foundation (FCRF), fancy pinks have appreciated by roughly 116 per cent over the past decade, outpacing all other fancy color categories for their investment potential.
The legendary Rainbow Collection more than 300 fancy coloured diamonds amassed over four decades by the late Eddy Elzas sold for just above its low estimate at Christie’s Geneva on 11 November, achieving $2.19 million against a pre-sale estimate of $1.98 million to $2.98 million.
Comprising around 350 carats and spanning the full colour spectrum, the collection was once hailed as one of the world’s most extraordinary private assemblages of fancy coloured diamonds. Over the years, press reports placed its value between $60 million and $100 million.
Elzas, affectionately known as “The King of Coloured Diamonds,” famously declined a lavish offer from a Saudi prince who reportedly wished to purchase the collection as a wedding gift for Prince Charles and Lady Diana.
A true pioneer in the fancy colour diamond trade, Eddy Elzas was instrumental in elevating global recognition of coloured diamonds during his 40-year career. He passed away in November 2021 at the age of 79.
Christie’s described the Rainbow Collection as “an impressive collection of unmounted coloured and treated coloured diamonds,” featuring 300 stones across an array of hues and shapes. The lot included 291 GIA reports dated between 2008 and 2025, with diamonds ranging from 0.24 carats to 4.89 carats in yellow, orange, blue, pink, red, brown, and grey tones.
For the DCLA, this sale highlights not only the enduring fascination with fancy colour diamonds but also the evolving market perception of rarity and provenance in today’s auction landscape.
The magnificent 42.68-carat Vanderbilt Sapphire, a gem steeped in the legacy of the Vanderbilt shipping and railroad dynasty, achieved an impressive $3.6 million at Phillips Geneva Jewels Auction: V more than double its high estimate of $1.5 million.
This sugarloaf-cut, unheated Kashmir sapphire, renowned for its velvety royal blue hue, was mounted in a 20th-century Tiffany & Co. brooch of elegant openwork scroll design, accented with white diamonds.
The sapphire was the undisputed highlight of the Geneva sale, held on 10 November, which totalled $17 million with 85% of the 114 lots sold.
While the highly anticipated 6.95-carat Golconda fancy vivid purplish pink diamond was withdrawn by mutual agreement between Phillips and the consignor, other notable results included a 10.08-carat light pink-brown diamond that achieved an auction record for its colour category, selling for $881,000 against an estimate of $650,000.
The event drew over 1,600 visitors to the preview and sale, with bidders from 44 countries, underscoring the strong global demand for exceptional natural gemstones and historic jewels.
Benoit Repellin, Phillips’ Worldwide Head of Jewellery, commented:
“The results of today’s sale attest to the enduring appeal of period jewels and the discerning eye of our international clients. To bring the jewels of the Vanderbilt family to the world’s stage was a moment of profound privilege.”
For collectors and connoisseurs, the Vanderbilt Sapphire’s result reaffirms the continued strength of the market for unheated Kashmir sapphires and heritage pieces with notable provenance a testament to their rarity, beauty, and timeless allure.
The legendary Mellon Blue Diamond a 9.51-carat fancy vivid blue, internally flawless gem sold for $25.5 million USD at Christie’s Magnificent Jewels auction in Geneva this week. The sale, held at the Four Seasons Hotel des Bergues, drew global attention from elite collectors and gem enthusiasts alike.
The Mellon Blue once belonged to renowned art collector Rachel Lambert “Bunny” Mellon, whose refined taste and cultural influence continue to shape the world of art and jewellery. Despite its exquisite pedigree, the price achieved represents a 22 percent decrease from its previous sale 11 years ago and a nearly 60 percent drop in real value when adjusted for inflation.
Originally auctioned at Sotheby’s in 2014 as part of Mellon’s estate collection, the diamond fetched $32.6 million USD, setting a world record for a blue diamond at that time. Adjusted for inflation, that sum equates to approximately $44.7 million in 2025.
Christie’s had estimated the gem between $20 million and $30 million, and the final sale once again highlighted the continuing prestige of exceptional coloured diamonds despite softer market conditions.
Rahul Kadakia, Christie’s Chairman of Global Luxury and President of Asia Pacific, remarked:
“It was a true honour to offer for sale the exquisite Mellon Blue Diamond here at Christie’s Geneva. It was another notable moment for Christie’s Luxury, evidencing the elite appetite amongst collectors for extraordinary and storied gems.”
The winning bidder, identified only as a collector from Hong Kong, continued the stone’s legacy of global fascination.
While the Mellon Blue once held the world record for a blue diamond, that benchmark has since been overtaken by two other remarkable stones:
The 14.62-carat Oppenheimer Blue, sold at Christie’s in 2016 for $57.5 million USD
The 15.10-carat De Beers Cullinan Blue, sold by Sotheby’s in 2022, also for $57.5 million USD
These historic sales underline the rarity and enduring appeal of fancy vivid blue diamonds, which represent less than 0.1 percent of all diamonds, and of those, fewer than 1 percent qualify as fancy vivid.
Bunny Mellon, who passed away in 2014 at age 103, was celebrated not only for her wealth being heiress to the Listerine and Mellon fortunes but also for her artistry and impeccable taste. She famously designed the White House Rose Garden and curated an impressive art collection that included two Rothko masterpieces, which together realised $76 million USD at auction.
When Christie’s announced the diamond’s return to auction earlier this year, Kadakia described the sale as a tribute to Mellon’s lasting influence, saying her legacy “elevates the Mellon Blue’s allure by tying it to her sophisticated aesthetic and cultural prominence.”
The auction itself was as heated as the competition literally with the auctioneer requesting the windows be opened mid-sale to cool the room as bidding intensified.
About DCLA: The Diamond Certification Laboratory of Australia (DCLA) is the official CIBJO-recognised diamond laboratory in Australia, specialising in independent diamond grading and certification. DCLA ensures the highest international standards of accuracy, integrity, and transparency in diamond evaluation.
Gaborone, Botswana — November 2025: Botswana’s move to secure majority control of De Beers, the world’s most iconic diamond company, marks a turning point in both African resource ownership and the global diamond market. The initiative, driven by President Duma Boko, represents one of the most significant sovereignty shifts in modern mining history, with potential to reshape how nations manage their natural wealth.
Why Botswana’s De Beers Acquisition Matters
Diamonds remain the cornerstone of Botswana’s economy — contributing nearly 30% to GDP and 80% of export earnings. Through its long-standing Debswana partnership with De Beers, the country has benefited from steady revenues but limited control over the strategic direction of its most vital industry.
Now, Botswana aims to change that. By pursuing a majority stake, the government seeks greater influence over production, marketing, and profit allocation — a shift that could transform the balance of power in the global diamond trade.
Current Ownership and Partnership Structure
Currently, Anglo American holds 85% of De Beers, while Botswana owns 15% through Debswana. Though this structure has delivered stability and growth, it also leaves Botswana as a minority player in decisions that directly affect its economy.
With Anglo American now restructuring its portfolio and considering divestment, Botswana has seized a rare opportunity to negotiate for majority control — aligning national interest with long-term sustainability and independence.
Economic Impact and Strategic Motivation
Diamonds have built Botswana’s success story, funding education, infrastructure, and healthcare. Yet, with rising competition from lab-grown diamonds and volatile global demand, the government recognises the need to safeguard revenue and ensure future resilience.
Majority control would allow Botswana to:
Align De Beers’ strategy with national priorities
Increase direct revenue and value capture
Enhance job creation through local beneficiation
Strengthen resilience against external market shocks
Understanding the De Beers Restructuring Opportunity
Anglo American’s decision to offload assets amid global portfolio optimisation has opened the door for Botswana’s historic bid. Market analysts suggest that De Beers’ valuation — affected by softer diamond demand — may now be more accessible, creating a once-in-a-generation acquisition opportunity for Botswana.
International sovereign wealth funds, including potential partners from Oman, have expressed interest in co-financing the acquisition, signalling global confidence in Botswana’s governance and the enduring value of natural diamonds.
Regional Competition and Cooperation
Botswana’s bid faces competition from Angola’s Endiama EP, which has also expressed interest in acquiring Anglo American’s stake. However, diplomatic discussions between Botswana and Angola hint at possible collaboration, with joint African ownership of De Beers emerging as a strategic alternative that could reinforce continental resource sovereignty.
Global Diamond Market Implications
If successful, Botswana’s acquisition would mark a paradigm shift:
African Resource Sovereignty: Establishing Botswana as a model for other resource-rich nations pursuing local ownership.
Supply Chain Control: Enhancing Africa’s ability to influence global pricing, production, and distribution strategies.
Market Stability: Strengthening natural diamond positioning against synthetic competitors through unified African leadership.
With potential to contribute over 35% to Botswana’s GDP and maintain its dominance in global exports, majority ownership could significantly enhance the nation’s economic resilience and international influence.
Challenges and Market Outlook
The acquisition faces hurdles, including valuation complexities, competitive bidding, and global demand fluctuations. Moreover, the diamond industry continues to navigate pressures from lab-grown alternatives, changing consumer preferences, and macroeconomic uncertainties.
Nevertheless, Botswana’s strategy demonstrates forward-thinking leadership — leveraging its expertise, governance stability, and long-term vision to secure sustainable control over its most valuable resource.
President Duma Boko’s Vision
“Government will leverage a majority stake. Concrete steps are under way towards the acquisition of Anglo American shares in De Beers,” — President Duma Boko, addressing Parliament, November 2025
His statement underscores Botswana’s commitment to advancing economic independence while setting a precedent for African nations reclaiming control of their mineral wealth.
What This Means for the Future
Should Botswana succeed, it will become the first African nation to hold majority ownership of the world’s largest diamond company — a move that could redefine the global diamond landscape for decades to come.
Beyond national pride, this transition represents a strategic realignment of power, giving Botswana direct control over pricing, marketing, and supply chain dynamics in the international diamond market.
Frequently Asked Questions
When will the Botswana De Beers deal be finalised? Negotiations are ongoing through late 2025. Completion depends on final agreements with Anglo American and potential co-investors.
How much will Botswana pay for majority control? Financial details remain confidential, with valuations influenced by current market conditions and strategic negotiations.
Will this affect global diamond prices? Yes — greater African control over supply could strengthen natural diamond pricing and reinforce consumer confidence in ethically sourced stones.
About DCLA
The Diamond Certification Laboratory of Australia (DCLA) is Australia’s official CIBJO-recognised laboratory, providing independent grading, authentication, and certification of natural diamonds. DCLA continues to report on global developments shaping the natural diamond industry, ensuring transparency and consumer confidence worldwide.
Disclaimer: This article is intended for informational and educational purposes only. The views and interpretations expressed do not necessarily reflect those of the Diamond Certification Laboratory of Australia (DCLA). All information is based on publicly available data and current market reports at the time of publication.DCLA does not provide financial, investment, or legal advice. Readers are encouraged to conduct their own research or consult with qualified professionals before making decisions related to diamond investment, trading, or acquisition.
The world of fine jewellery is abuzz with the remarkable discovery of the legendary “Florentine” diamond a 137-carat yellow pear-shaped gem once belonging to the imperial Habsburg family of Austria-Hungary. After more than a century of mystery, the fabled diamond has resurfaced, astonishing historians and gem experts alike.
According to reports in international media, descendants of Emperor Charles I and Empress Zita revealed that the diamond had been safely stored in a Canadian bank vault for 100 years, fulfilling a century-long vow of secrecy made by the late Empress. The revelation ends decades of speculation surrounding one of the most famous missing royal jewels in history.
A Jewel of Remarkable Provenance
The Florentine diamond’s story stretches back centuries. Believed to have once belonged to the Medici family of Florence, the stone later became part of the Habsburg crown jewels. Some historians suggest the gem was originally cut for Charles the Bold, Duke of Burgundy, before finding its way to the Habsburg treasury.
The diamond vanished in the aftermath of World War I, when Emperor Charles I fled Vienna following the collapse of the Austro-Hungarian Empire. Many assumed the gem was lost or stolen during the family’s exile, adding to its mythical reputation and inspiring numerous books, films, and conspiracy theories.
Hidden Under Royal Secrecy
New accounts from Habsburg descendants reveal that the diamond was never lost. When the family sought refuge in Canada during World War II, they secretly transferred the Florentine along with other royal jewels to a bank vault, acting on Empress Zita’s orders. Only her sons, Archdukes Robert and Rodolphe, were informed of its location, bound by her request for confidentiality until 100 years after Charles I’s death in 1922.
With the vow now fulfilled, Karl Habsburg-Lothringen, grandson of Emperor Charles I, alongside his cousins Lorenz and Simeon von Habsburg, have confirmed the diamond’s existence and plan to exhibit the gem publicly in Canada as a gesture of gratitude to the country that sheltered their family.
A Treasure Reborn
The 137-carat golden-yellow diamond, renowned for its striking pear shape and exceptional size, is considered one of history’s most significant gemstones. Its rediscovery resolves one of the great mysteries of the 20th century, marking an extraordinary moment in the history of royal jewels.
The news follows renewed global fascination with high-profile jewel thefts including the recent Louvre robbery, where thieves made headlines by stealing crown jewels from the Apollo Gallery using a truck-mounted cherry picker.
With the Florentine diamond’s reappearance, the world’s attention once again turns to the enduring allure of legendary gems and the fascinating histories they carry a reminder of the importance of certification, provenance, and preservation in the world of fine diamonds.
Verified Provenance and Diamond Expertise
The reemergence of the Florentine diamond highlights the crucial importance of authentic certification and traceable provenance in the world of rare and historical gems. As the official CIBJO laboratory for Australia, the Diamond Certification Laboratory of Australia (DCLA) upholds these same principles ensuring every diamond’s identity, quality, and history are verified through independent, internationally recognised grading standards.
From modern treasures to legendary jewels of royal heritage, DCLA remains Australia’s trusted authority in diamond certification, valuation, and provenance verification, preserving the integrity of the world’s most extraordinary stones.
Each November, Geneva takes centre stage in the world of fine jewellery, and Sotheby’s 2025 High Jewellery and Royal & Noble Jewels sales reaffirm why the city remains its beating heart. This year’s auctions bring together a breathtaking display of natural diamonds, historical heirlooms, and masterful craftsmanship that celebrate centuries of artistry and provenance.
At the forefront of the Sotheby’s High Jewellery Sale is The Glowing Rose, an extraordinary 10.08-carat Fancy Vivid Pink diamond estimated at around USD 20 million. Its rare, “pure pink” hue—free from secondary tones—places it among the most valuable gemstones in existence. Comparable to celebrated stones such as the Williamson Pink Star and Pink Legacy, this exceptional diamond embodies the geological miracle of atomic distortion, which gives natural pink diamonds their ethereal glow. Stones of this size and purity are exceedingly rare, making The Glowing Rose the undeniable star of the season.
Colour remains the hallmark of this year’s Geneva sale. A pair of Fancy Vivid Yellow diamond earrings, weighing 38.66 and 38.88 carats, are expected to achieve between CHF 2,000,000 and CHF 3,800,000. Their radiant colour intensity and impressive carat weight represent the highest standards of fancy diamond grading. Equally captivating is a 4.50-carat Fancy Vivid Blue diamond, internally flawless and estimated at CHF 4,400,000 to CHF 5,800,000. The blue hue, caused by trace boron, adds to its rarity and appeal, offering collectors the coveted trifecta of exceptional colour, clarity, and size.
Among the coloured gemstones, a 7.69-carat “Royal Blue” Kashmir sapphire set in a ring-pendant combination by Van Cleef & Arpels is a standout. Revered for their velvety “sleepy” lustre, Kashmir sapphires are among the most desirable in the world, and this piece exemplifies the pinnacle of gemological beauty. Further artistry is showcased through a pair of sapphire, tsavorite garnet, and diamond earclips by JAR—vividly imaginative and estimated at CHF 300,000 to CHF 500,000—reflecting the contemporary genius of Joel Arthur Rosenthal.
The sale also includes signature creations by Van Cleef & Arpels, Cartier, Graff, and De Grisogono. Highlights include a 10.04-carat marquise-shaped D-colour diamond ring by Graff (VVS2 clarity, estimated CHF 320,000–560,000) and a De Grisogono ruby and diamond bombé ring featuring two step-cut diamonds (estimated CHF 55,000–75,000).
In tribute to a century of Art Deco design, Sotheby’s presents an array of geometric masterpieces from Cartier and Van Cleef & Arpels, embodying the symmetry and elegance that shaped modern jewellery aesthetics. Two private collections will also headline the event: one dedicated exclusively to Van Cleef & Arpels, and another—Aria of Jewels: The Collection of Antje-Katrin Kühnemann—featuring exceptional Cartier and De Grisogono pieces from the late philanthropist’s private trove.
The Royal & Noble Jewels: A Journey Through History
Complementing the High Jewellery Sale, Sotheby’s Royal & Noble Jewels auction unveils some of the most historically significant diamonds and heirlooms ever offered. Among them is a diamond brooch once owned by Emperor Napoleon Bonaparte, lost during his flight after Waterloo and later recovered by the Prussian Royal family. After more than two centuries in private hands, it now re-emerges for the first time at auction.
Also featured is a light pink diamond ring with royal lineage, once belonging to Empress Catherine I of Russia and later to Princess Neslishah Sultan, estimated between CHF 240,000 and CHF 400,000. A natural pearl and diamond jewel formerly owned by Cunegonde of Saxony (cousin of Louis XVI) carries an estimate of CHF 340,000 to CHF 500,000, while a diamond tiara with a wild roses motif from the Duchess of Portland (1774–1844) is expected to fetch CHF 100,000 to CHF 170,000.
Adding to the grandeur is a Cartier emerald and diamond necklace featuring an 11.78-carat Colombian emerald, commissioned in 1932, exemplifying Art Deco refinement and royal provenance.
Celebrating Provenance, Craftsmanship, and Natural Rarity
From Napoleon’s lost brooch to The Glowing Rose, Sotheby’s Geneva continues to highlight how exceptional gems transcend beauty—they embody heritage, artistry, and history. These November 2025 auctions remind the world that in fine jewellery, rarity, provenance, and craftsmanship remain the ultimate symbols of enduring value.
About DCLA The Diamond Certification Laboratory of Australia (DCLA) is the official CIBJO-accredited laboratory for Australia, recognised for its expertise in diamond grading and certification. DCLA continues to support transparency and integrity within the global diamond trade, celebrating events such as Sotheby’s Geneva that showcase the brilliance and authenticity of natural diamonds.
The Rockefeller Kashmir, an Art Deco ring that belonged to the late John D. Rockefeller 3rd and his wife Blanchette, is to appear in a sale of the couple’s vast art collection.
The Cartier features a 17.66-carat cushion faceted base pyramidal sugarloaf cabochon sapphire, with diamonds and carries a $1.5m to $2.5m estimate.
The ring was created around 1925 and has been in the Rockefeller family for three generations.
John D. Rockefeller 3rd inherited billions of dollars from the family’s Standard Oil empire, and was a prominent philanthropist.
The ring will be auctioned at Christie’s New York at the Magnificent Jewels event, during their December Luxury Week, on 10 December.
The collection of Asian art, jewelry, major American paintings and other heirlooms, was held by the couple’s daughter Sandra Ferry Rockefeller, who died in October 2024, aged 89.
Some of the sale proceeds will benefit her youth empowerment foundation.
Sotheby’s is set to showcase one of the world’s rarest diamonds during its upcoming series of luxury auctions and exhibitions in Abu Dhabi, held from 2 to 5 December at The St. Regis Saadiyat Island Resort. The events form part of Abu Dhabi Collectors’ Week, which will feature masterclasses, panel discussions, and curated exhibitions highlighting fine jewellery, timepieces, collector cars, luxury real estate, and other exceptional assets.
The highlight of the auction is “The Desert Rose”, a 31.86-carat fancy vivid orangy-pink diamond, the largest of its kind ever graded. This extraordinary pear-shaped gem—first unveiled in Sotheby’s “Beyond: The World’s Rarest Diamonds” exhibition earlier this year—makes its auction debut with an estimated value of USD $5–$7 million.
The timing of the event coincides with one of Abu Dhabi’s busiest weeks, which includes the Formula 1 Grand Prix, the Milken Institute Middle East and Africa Summit 2025, Abu Dhabi Finance Week, and Bitcoin MENA. Together, these prestigious gatherings are expected to attract a global audience of collectors, investors, and cultural leaders.
Following Sotheby’s successful inaugural sale in Saudi Arabia earlier this year, the Abu Dhabi auctions further underscore the Middle East’s growing influence in the global luxury and cultural landscape. Saadiyat Island, home to institutions such as the Louvre Abu Dhabi, the forthcoming Guggenheim Abu Dhabi, and the Zayed National Museum, continues to establish itself as a world-class destination for art and high-value collectibles.
The Desert Rose diamond’s debut marks a milestone in coloured diamond history—its rarity, hue, and size exemplify the exceptional standards that define the world’s most coveted gems.
Five more suspects were arrested on Wednesday night (29 October) in connection with the Louvre heist.
One is believed to be a member of the four-man team that carried out the raid, who was identified through DNA evidence and seen on CCTV footage.
The two suspects arrested earlier (on 25 October) have “partially admitted” their involvement in the crime, according to French investigators.
Napoleonic crown jewels valued at over $100m were stolen on Sunday 19 October just as the museum, in Paris, was opening to visitors.
The thieves used mechanical ladder to reach a second-floor balcony, cut through the display cases with power tools, then escaped on motorbikes.
Laure Beccuau, the public prosecutor in Paris, said there was currently no evidence to suggest the theft was an inside job. None of the those arrested worked at the museum.
The four-man gang who carried out the raid left behind a motorbike helmet which provided a crucial hair sample believed to be linked to one of the suspects, together with multiple DNA samples.
The Louvre, the most-visited museum in the world, has since moved the remaining crown jewels to a vault at the Bank of France.
