What Is the World Largest Blue Sapphire
The world largest blue sapphire is the Star of Adam, a 1,404.49 carat cabochon-cut star sapphire mined in Ratnapura, Sri Lanka, in 2015. https://www.forbes.com/sites/leorentz/2015/08/27/the-worlds-largest-blue-sapphire-is-a-1404-carat-star-of-adam-found-in-sri-lanka/ The gem was sold in 2016 for an estimated 100 million USD, setting a benchmark for high-value blue sapphires. https://www.forbes.com/sites/leorentz/2015/08/27/the-worlds-largest-blue-sapphire-is-a-1404-carat-star-of-adam-found-in-sri-lanka/
As of the latest public records, the Star of Adam remains the largest blue sapphire by certified weight. https://www.gia.edu/sapphire The stone is a Ceylon sapphire, meaning it originated in Sri Lanka, and its blue color is attributed to trace amounts of iron and titanium. https://www.gia.edu/sapphire
Market Value and Ownership
The Star of Adam was purchased by a private collector, and its value is based on size, color saturation, clarity, and the distinct six-rayed star effect. https://www.sothebys.com/en/auctions/estates/the-star-of-adam The sale price of around 100 million USD reflects its rarity, as stones above 1,000 carats are exceptionally uncommon in the global gem market. https://www.sothebys.com/en/auctions/estates/the-star-of-adam
In the broader sapphire market, large blue sapphires above 100 carats typically command prices from several thousand to tens of thousands of USD per carat, depending on origin and treatment. https://www.gemval.com/ The Star of Adam is listed among the top colored gemstones by weight, alongside the Logan Blue Sapphire and the Blue Giant of the Orient. https://www.gemval.com/
How the Star of Adam Compares to Other Large Sapphires
The Star of Adam ranks above other famous blue sapphires such as the 486 carat Logan Sapphire and the 463 carat Blue Giant of the Orient in terms of raw carat weight. https://www.gia.edu/sapphire Its star effect, caused by rutile needle inclusions aligned in a hexagonal pattern, adds to its collector value. https://www.gia.edu/sapphire
Sri Lanka remains a leading source for large high-quality sapphires, with Ratnapura and Elahera historically producing some of the world's most notable stones. https://www.gia.edu/sapphire The discovery of the Star of Adam reinforced Sri Lanka's position in the global colored gemstone market, alongside major producers like Myanmar, Madagascar, and Australia. https://www.gia.edu/sapphire