The Most Famous Large Blue Sapphires in the World

The Star of Adam (1,404 carats)

Widely regarded as the largest blue star sapphire ever discovered, the Star of Adam weighs an astonishing 1,404 carats. Found in Sri Lanka, this gemstone displays a distinct six-rayed star effect, known as asterism.

Its sheer size and rarity make it almost priceless, with estimates reaching over £200 million. Unlike faceted gems, its beauty lies in its natural formation and silky internal structure.

The Logan Sapphire (422.99 carats)

Housed in the Smithsonian Institution, the Logan Sapphire is one of the largest faceted blue sapphires in the world. Weighing just under 423 carats, it is set in a stunning necklace surrounded by diamonds.

Originating from Sri Lanka, its rich, velvety blue colour is a hallmark of fine Ceylon sapphires. It was donated to the Smithsonian in 1960 and remains one of the museum’s most admired treasures.

The Blue Belle of Asia (392.52 carats)

The Blue Belle of Asia is a legendary gemstone with both size and provenance. Weighing 392.52 carats, it was discovered in Sri Lanka and has passed through royal ownership.

In 2014, it sold at auction for over $17 million, setting a record for sapphire prices at the time. Its exceptional clarity and vivid royal blue colour place it among the finest sapphires ever cut.

The Stuart Sapphire (104 carats)

Part of the British Crown Jewels, the Stuart Sapphire weighs approximately 104 carats and sits prominently in the Imperial State Crown.

Believed to date back centuries, it has been worn by monarchs including Charles II. Its historical significance arguably outweighs even its gemological value.

The Rockefeller Sapphire (62.02 carats)

Though smaller than others on this list, the Rockefeller Sapphire is one of the most valuable per carat. Weighing 62.02 carats, it boasts exceptional colour and provenance.

Originally purchased by John D. Rockefeller Jr., it later sold for millions at auction, reflecting the premium placed on top-quality Kashmir sapphires.

What Makes These Sapphires So Special?

Across all these stones, a few defining traits stand out:

• Colour: The most prized sapphires display a rich, saturated blue without appearing too dark or inky

• Origin: Kashmir sapphires are famed for their velvety texture, while Sri Lankan stones often exhibit brilliance and clarity

• Size + Quality Combination: Large sapphires are rare—but large and flawless sapphires are extraordinarily scarce

• Provenance: Royal ownership or historic significance can dramatically increase value

Final Thoughts

Very large blue sapphires sit at the pinnacle of the gemstone world. They are not simply decorative objects but natural masterpieces—formed over millions of years and treasured for generations.

Whether displayed in museums, worn by royalty or locked away in private collections, these extraordinary gems continue to captivate collectors and enthusiasts alike.

Their allure lies not only in their size, but in the stories they carry—stories of discovery, power, wealth and timeless beauty.