The imminent closure of the Argyle Diamond Mine, nestled in the remote east Kimberley region of Western Australia, marks the end of an extraordinary era. After nearly forty years of unparalleled production, this geological marvel is scheduled to cease operations by the close of 2020. Its legacy, however, will forever be etched in the annals of gemology, primarily due to its astounding yield of vivid pink, red, blue, and violet diamonds – colors of such rarity and intensity that they have captivated collectors and connoisseurs worldwide.
As a final, magnificent tribute to its storied history, Rio Tinto, the mine’s operator, presents the “One Lifetime, One Encounter” auction event. This isn’t merely a sale; it’s a historic tender offering a meticulously curated collection of the rarest diamonds unearthed from Argyle’s final year of production. Each gem represents the culmination of generations of geological processes and decades of dedicated mining, making this event a truly once-in-a-lifetime opportunity for those seeking to own a piece of Earth’s deepest treasures.
The Enduring Legacy of Argyle Pink Diamonds
Discovered in 1979, the Argyle mine quickly established itself as the world’s preeminent source of fancy colored diamonds, particularly its signature pink hues. While it produced a vast quantity of brown diamonds, it was the discovery of its intensely colored pink, red, blue, and violet diamonds that truly set it apart. These gems, representing less than 0.01% of the mine’s total diamond output, possess a unique structural deformation that gives rise to their extraordinary coloration, distinct from the nitrogen impurities found in yellow diamonds or boron in blue diamonds. This geological anomaly, combined with the sheer beauty and saturation of their color, has positioned Argyle pink diamonds as one of the most coveted and valuable commodities on the planet, consistently appreciating in value year after year.
An Unparalleled Discovery and Its Global Impact
The impact of the Argyle Mine on the global diamond industry cannot be overstated. Before its discovery, truly vivid pink diamonds were almost unheard of, making Argyle responsible for establishing the standard for fancy colored diamonds. Its consistent supply, albeit small, allowed for the development of a specialized market and an appreciation for these magnificent rarities. The mine not only provided a majority of the world’s high-quality pink diamonds but also introduced a spectrum of blues, violets, and reds, each with its own distinctive charm and unparalleled intensity. As the mine closes, the scarcity of these diamonds will naturally increase, solidifying their status as irreplaceable investments and cherished heirlooms.
Geological Marvel: The Lamproite Pipe
What makes Argyle diamonds truly unique is not just their color, but also the geological setting from which they originate. Unlike most diamond mines that are found in kimberlite pipes, Argyle diamonds are hosted in a lamproite pipe. This rare volcanic rock formation is incredibly distinct and is believed to contribute to the unique structural characteristics of the Argyle diamonds, ultimately leading to their exceptional color. This geological singularity underscores the fact that the Argyle Mine is not just another diamond source; it is a one-of-a-kind natural phenomenon whose treasures cannot be replicated elsewhere on Earth. The closure of the mine therefore represents an irreplaceable loss of a unique geological tap, ensuring that the existing Argyle diamonds will continue to climb in prestige and value.
“One Lifetime, One Encounter”: A Historic Tender
The “One Lifetime, One Encounter” tender is far more than a routine auction; it is a momentous occasion, representing the very last offering of top-tier diamonds from the legendary Argyle Mine. This historic collection comprises 62 exquisite diamonds, boasting a combined weight of 57.23 carats. Each gem has been carefully selected, not only for its exceptional beauty but also for its profound historical significance as a final testament to Argyle’s glorious output. The tender’s name itself evokes the fleeting nature of this opportunity, emphasizing that once these diamonds are dispersed among collectors, such a chance to acquire them directly from the source will never arise again.
A Traveling Tender Amidst Global Changes
In response to the unprecedented global restrictions caused by the COVID-19 pandemic, the “One Lifetime, One Encounter” auction ingeniously adapted its format to ensure accessibility for its elite clientele. The event commenced with an exclusive virtual preview, providing a select group of international collectors, discerning connoisseurs, and prestigious jewelry houses with an intimate glimpse into this unparalleled collection. Following the virtual showcase, a series of carefully planned live viewings were organized. These viewings began at the source, the Argyle Mine itself, and then traveled to Perth, Australia, before embarking on an international journey to Singapore and finally concluding in Antwerp, Belgium, a global hub for diamond trading. This thoughtful approach allowed potential bidders from around the world to experience the breathtaking beauty of these diamonds firsthand, adhering to safety protocols while maintaining the grandeur of the event. Bids for this monumental tender were set to close on December 2, 2020, marking a pivotal date in the history of diamond collecting.
“The Argyle pink diamond story has continued to enthrall throughout the years following the remarkable discovery of the Argyle mine in 1979. The 2020 Argyle Pink Diamonds Tender is a collection of rare earthly treasures, intricate works of art and with a potency of color that will be keenly sought after by collectors and connoisseurs from around the world.”
These words from Patrick Coppens, General Manager of Sales and Marketing for Rio Tinto’s diamonds business, perfectly encapsulate the sentiment surrounding this final tender. He underscores the enduring fascination with Argyle diamonds and highlights the exceptional quality and artistic value inherent in this particular collection, predicting intense competition among bidders eager to acquire these extraordinary gems.
The Illustrious Hero Diamonds
At the heart of the “One Lifetime, One Encounter” collection are six extraordinary “Hero Diamonds,” each a masterpiece of nature, bearing a unique name and possessing unparalleled characteristics. These are the crown jewels of the final tender, representing the pinnacle of Argyle’s production of colored diamonds:
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Lot 1: Argyle Eternity™
This magnificent 2.24-carat round brilliant cut diamond stands as the undisputed highlight of the tender. Named Argyle Eternity™, its Fancy Vivid Purplish Pink hue is of an intensity and saturation rarely seen, even among Argyle’s exceptional output. Its classic round brilliant shape maximizes its brilliance and fire, making it a timeless gem that embodies the mine’s enduring legacy. “Eternity” aptly reflects its lasting impact and the infinite beauty it holds.
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Lot 2: Argyle Ethereal™
Weighing an impressive 2.45 carats, the Argyle Ethereal™ is a square radiant shaped Fancy Intense Purple-Pink diamond. Its radiant cut, known for combining the elegance of an emerald cut with the brilliance of a round, allows its deep purple-pink color to truly radiate. The “Intense” classification signifies a strong, captivating color saturation, giving this diamond an almost mystical allure, truly living up to its “Ethereal” designation.
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Lot 3: Argyle Sakura™
The Argyle Sakura™, a beautiful 1.84-carat pear-shaped Fancy Vivid Purplish Pink diamond, draws its name from the delicate and symbolic Japanese cherry blossom. Its “Vivid” classification denotes the highest possible color intensity, making its purplish-pink hue spectacularly vibrant and alive. The elegant pear shape, with its single point and rounded end, enhances its sophisticated appearance and emphasizes its exquisite color, symbolizing beauty and renewal.
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Lot 4: Argyle Emrys™
A truly unique specimen, the Argyle Emrys™ is a 0.43-carat princess shaped Fancy Deep Grayish Violetish Blue diamond. This gem is a testament to Argyle’s broader spectrum of rare colors beyond pinks. The “Deep” intensity combined with its complex “Grayish Violetish Blue” modifiers creates a profound, almost enigmatic hue. The princess cut, known for its sharp corners and brilliant facets, perfectly complements its distinctive color, making it a rare and intriguing acquisition.
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Lot 5: Argyle Skylar™
The Argyle Skylar™ is a charming 0.33-carat heart shaped Fancy Dark Gray-Violet diamond. This diamond’s romantic heart shape belies its “Dark Gray-Violet” color, which is both mysterious and captivating. The “Dark” modifier indicates a rich, deep tone, giving this violet diamond a distinct presence. Its smaller size belies its immense rarity, as Argyle violet diamonds are among the rarest of all. “Skylar” suggests the vast, beautiful expanse of a twilight sky, reflecting its unique color.
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Lot 6: Argyle Infinité™
Rounding out the Hero Diamonds is the Argyle Infinité™, a 0.70-carat oval shaped Fancy Dark Violet-Gray diamond. The oval cut is celebrated for its ability to enhance color, making this “Dark Violet-Gray” diamond appear incredibly rich and deep. Like the “Skylar,” its violet-gray hue is exceptionally rare and highly sought after. “Infinité” speaks to the endless depth of its color and the enduring legacy of the Argyle Mine itself, making it a truly profound gem for collectors.
The Petite Suites: Miniature Masterpieces
Beyond the illustrious Hero Diamonds, the “One Lifetime, One Encounter” tender also features an additional twelve highly coveted lots, collectively known as The Petite Suites. These meticulously curated sets are described by Rio Tinto as “never to be repeated,” highlighting their irreplaceable nature. Comprising miniature rare Argyle pink, red, blue, and violet diamonds, these suites offer a harmonious balance of size, shape, color, and clarity. They have been painstakingly collected over a five-year period, representing the finest small diamonds from the mine’s later years. Each Petite Suite is a miniature work of art, designed to showcase the full spectrum of Argyle’s unique colors in a collectible format. One such breathtaking lot, named “Zenith,” perfectly exemplifies the exquisite craftsmanship and natural beauty encapsulated within these unique collections. These suites offer a rare opportunity to own a piece of Argyle’s heritage in a truly distinctive manner, perfect for discerning collectors and investors.

A Glorious Lifetime, A Lasting Legacy
The Argyle Mine’s journey, from its remarkable discovery to its final tender, encapsulates a glorious lifetime of mineral wealth and unparalleled beauty. It stands as one of the greatest diamond mines in history, not only for its sheer volume but more profoundly for its singular contribution of the world’s most saturated, high-quality pink, red, blue, and violet diamonds. The geological anomaly of its lamproite host rock ensured that these precious gems were truly one of a kind, a phenomenon unlikely to be replicated anywhere else on Earth. As the mine concludes its operations, the supply of these extraordinary colored diamonds will inevitably diminish, making existing Argyle diamonds even more precious and sought after. This cessation of supply underscores the immense investment value and emotional significance of every Argyle diamond, solidifying their status as enduring symbols of rarity, beauty, and geological wonder.

The Investment and Emotional Value
For collectors and investors, the “One Lifetime, One Encounter” tender represents a strategic opportunity. The intrinsic rarity of Argyle pink diamonds, coupled with the definitive closure of their primary source, guarantees their continued appreciation in value. These are not just gemstones; they are tangible assets with a proven track record of outperforming other luxury investments. Beyond their financial worth, however, lies an immense emotional value. Each Argyle diamond carries with it the story of a remote Australian wilderness, a unique geological event, and decades of human endeavor. Owning one of these final gems is to possess a piece of history, a relic from a glorious era that will never be repeated. They are heirlooms for future generations, symbols of enduring beauty and the Earth’s profound mysteries.
Conclusion: An Unforgettable Chapter Closes
The curtain falls on the Argyle Diamond Mine, but its legacy shines brighter than ever through the “One Lifetime, One Encounter” tender. This final collection of breathtaking pink, red, blue, and violet diamonds is a testament to the mine’s unparalleled contribution to the world of haute joaillerie. As these exquisite gems find their new homes, they will forever carry the unique provenance of Argyle, reminding us of a geological wonder and a mining triumph. This is more than an auction; it is a farewell, a celebration of rarity, and an invitation to own a piece of history. For those fortunate enough to acquire these last treasures, it is indeed “One Lifetime, One Encounter” with true magnificence.