Explore a fascinating collection of the rarest and most valuable gemstones on the planet. This list highlights the largest and most celebrated blue diamonds, renowned for their exceptional size, vibrant colour, and priceless value. From centuries-old historical pieces to recent record-breaking auction discoveries, delve into the world of these natural wonders. Discover details of their origin, carat weight, and the stories that have made them legends in the gem market.
12.03 carats
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This diamond is a 12.03-carat fancy vivid blue specimen, an extreme rarity in the world of gemstones. Its flawless nature and origin from the Cullinan mine, renowned for producing exceptional diamonds, establish it as a priceless piece and a natural wonder.
Largest and best quality blue diamond ever at auction
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This diamond is a 14.62-carat Fancy Vivid Blue, making it one of the largest and most valuable blue diamonds ever auctioned. Its sale for $57.5 million at Christie's Geneva in May 2026 set a world record for any jewel sold at auction.
Famed for its great size
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The Hope Diamond is a 45.52-carat blue diamond, notable for its impressive size and unique blue-violet color. Its estimated value of US$200–350 million underscores its status as one of the world's most valuable and largest gems. Its rich history and display at the National Museum of Natural History establish it as a global benchmark.
One of the largest historic blue diamonds ever fashioned
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The Wittelsbach-Graff is a 31.06-carat deep-blue diamond with internally flawless clarity, making it one of the largest and purest known blue diamonds. Its 400-year history, including its origin in the Kollur Mine and its journey through royal courts, adds immense historical and cultural value to its intrinsic rarity.
27.64 carats
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The Heart of Eternity is a 27.64-carat blue diamond, renowned for its exceptional "Fancy Vivid Blue" color grading. Its substantial size and vivid blue hue establish it as one of the most prominent gems in the realm of large and valuable blue diamonds.
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Largest fancy blue diamond ever offered at auction
The Azure Blue is a 31.62-carat fancy blue diamond, the largest of its kind ever offered at auction. Its exceptional size and internally flawless grading establish it as a gem of extraordinary value in the world of blue diamonds.
Nearly 42-carat size
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This 41.82-carat blue diamond is an exceptional find due to its significant size and its classification as a Type IIb stone, indicating extraordinary purity and color. Its recovery from the Cullinan Mine, renowned for its high-value diamonds, positions it as a highly important specimen in the world of gemology.
Rare and exotic blue diamond
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The Golconda Blue is a 23.24-carat vivid blue diamond, notable for its extraordinary size and intense color. Its origin from the historic Golconda region, renowned for producing diamonds of unparalleled purity, and its estimated value of up to $50 million, position it as a gem of global significance.
This ranking is compiled from extensive research into the largest and most iconic blue diamonds known, using verified information about their size, value, and historical relevance. No scientific formulas or external audits are used, but rather an editorial criterion based on available information.