In a ceremony that captured global attention on January 17, the owners of what is now recognized as the world’s largest documented natural purple star sapphire unveiled their extraordinary discovery to the international gemological community. The massive gemstone, officially named the Star of Pure Land, weighs an astonishing 3,563 carats (approximately 712.6 grams or 1.57 pounds) and has been valued by international experts at between $300 million and $400 million, positioning it among the most valuable gemstones ever discovered.
The unveiling took place at a special briefing in Sri Lanka’s capital, where consultant gemologist Ashan Amarasinghe confirmed the gemstone’s record-breaking status and exceptional qualities. “This is the largest purple star sapphire of its kind,” Amarasinghe told assembled media and gemological experts. “It shows a well-defined asterism. It has six rays asterism. That’s something special out of all the other stones.”
The Star of Pure Land: A Discovery Years in the Making
The Star of Pure Land’s journey to international recognition began in 2023 when the gem was discovered in a mining pit near Ratnapura, a remote Sri Lankan town whose name translates to “City of Gems.” This region in south-central Sri Lanka has been the source of some of the world’s most famous sapphires, including the Blue Giant of Orient (466 carats), the Logan Blue Sapphire (423 carats), the Blue Belle of Asia (400 carats), and the Star of Lanka (393 carats).
The owners of the newly unveiled sapphire, known collectively as the Star of Pure Land Team, have chosen to remain anonymous for security reasons, a decision that underscores both the gem’s extraordinary value and the legitimate concerns about criminal interest in such high-value discoveries. One team member disclosed at the unveiling that the stone was found in a traditional gem pit, where generations of Sri Lankan miners have extracted precious stones using methods passed down through centuries.
Following its discovery, the rough gemstone underwent extensive analysis and polishing by skilled craftsmen who understood the delicate task of revealing the stone’s natural beauty without compromising its structural integrity or diminishing its remarkable optical properties. The decision to cut the stone as a round cabochon, one of the most technically challenging forms in corundum, required extraordinary skill and precision, particularly given the gem’s massive size.
Scientific Verification and Certification
The Star of Pure Land has undergone rigorous scientific examination and certification by two of the world’s most respected gemological institutions. The Gemological Institute of America (GIA), widely regarded as the gold standard in gem certification, has confirmed the sapphire’s authenticity, natural and unheated formation, and rare optical properties. This GIA certification provides prospective buyers with the highest level of confidence in the gem’s provenance and characteristics.
Additionally, the Lanka Gemological Laboratory (LGL) has independently documented the stone’s classification and confirmed its Sri Lankan (Ceylon) origin—a designation that carries significant weight in the international gem market, as Ceylon sapphires have long been prized for their exceptional quality and color.
The round-shaped gem measures between 66.46 and 67.87 millimeters in width and 71.17 millimeters in length. It has been classified as semi-translucent to opaque, with a rich purple coloration that gemologists describe as exceptionally rare and desirable. The stone remains uncut in its polished cabochon form, preserving its natural character while optimizing its optical properties.
The Phenomenon of Asterism
What elevates the Star of Pure Land beyond mere size is its exceptional asterism (the optical phenomenon that gives star sapphires their name and mystique). When light strikes the properly cut surface of a star sapphire, it produces a luminous star pattern that appears to float above the stone’s surface. This effect results from reflections of light from extremely fine needle-shaped inclusions of rutile (titanium dioxide) within the sapphire’s crystal structure.
The Star of Pure Land displays a six-ray asterism noted for its exceptional clarity, symmetry, and definition. More remarkably, experts have highlighted the sapphire’s girdle-to-girdle expression of the star phenomenon—a feature rarely observed in gemstones of any size, let alone in a specimen of such monumental proportions. This means the star effect is visible across the entire surface of the stone, not just in certain orientations or lighting conditions.
“Of particular rarity is its girdle-to-girdle expression of the star phenomenon, a feature seldom observed in gemstones of museum scale,” noted specialists at the unveiling briefing. This technical excellence in the stone’s natural formation and subsequent cutting makes it not just the largest purple star sapphire, but arguably one of the finest examples of the asterism phenomenon ever documented.
Comparative Context: A Gemstone Among Giants
To fully appreciate the Star of Pure Land’s significance, it helps to compare it with other famous large sapphires. The Star of India, perhaps the most famous star sapphire in the world, weighs 563 carats and is housed at the American Museum of Natural History in New York. The Star of Pure Land weighs more than six times as much.
The Star of Lanka, owned by Sri Lanka’s National Gem and Jewelry Authority, weighs 393 carats—impressive by any standard, yet the Star of Pure Land is nearly nine times larger. The Blue Belle of Asia, a remarkable 392-carat cushion-cut sapphire that sold for approximately $17 million in 2014 and $11.3 million in 2025, demonstrates the tremendous value placed on exceptional large sapphires even without the asterism phenomenon.
The Black Star of Queensland, discovered in Australia and weighing 733 carats, held the record as the world’s largest star sapphire for decades. The Star of Pure Land dwarfs even this legendary gem, nearly quintupling its weight while adding the exceptional rarity of purple coloration.
These comparisons underscore that the Star of Pure Land isn’t just marginally larger than previous record-holders. It represents a quantum leap in size while maintaining exceptional quality in color, clarity, and asterism. This combination places it in an entirely different category from any previously known purple star sapphire (or sapphire for that matter).
A Gemstone for the Ages
The Star of Pure Land represents more than impressive statistics and staggering valuations. It embodies the romance of gem discovery, the expertise of traditional mining cultures, the precision of modern gemological science, and the enduring human fascination with rare and beautiful natural objects. Its journey from deep within the Earth’s crust to international recognition spans geological time measured in millions of years and human time measured in centuries of Sri Lankan gem mining tradition.
For gemologists, the sapphire provides an exceptional example of nature’s ability to create objects of astonishing beauty and complexity through purely natural processes. For Sri Lanka, it reinforces the nation’s position at the pinnacle of the global gem trade. For the broader public, it offers a reminder that the Earth still holds treasures capable of inspiring wonder and awe.
As the Star of Pure Land moves toward its next chapter, whether in a private collection, a museum display, or perhaps incorporated into an extraordinary piece of jewelry, it carries with it a story of geological forces, human skill, and the enduring allure of exceptional natural gemstones. Its combination of extreme size, rare color, perfect asterism, and flawless execution makes it genuinely unique in the world, a natural wonder that might not be equaled in our lifetime.
Featured images: Getty Images
Sewelo is a world where jewelry, watches, and objects come alive in a shimmering dance of fantasy. Through a literary lens, we celebrate the beauty and elegance that make these treasures more than just possessions.
