The Cullinan Diamond is recognized as the largest gem-quality rough diamond ever discovered, and its legacy lives on in several finished stones held in royal and public collections. Understanding what the largest cut diamond in existence actually is requires looking at both the historic rough crystal and the largest polished diamond currently on display.
Because the original crystal was divided into many named stones, the answer depends on whether you are asking about the largest single polished gem or the largest cut stone derived from the Cullinan rough. This article clarifies both records and how modern observers define size in exceptional diamonds.
| Stone | Weight (carats) | Cut Form | Current Location |
|---|---|---|---|
| Cullinan I (Great Star of Africa) | 530.20 | Round brilliant | British Crown Jewels |
| Cullinan II (Second Star of Africa) | 317.40 | Marquise brilliant | Imperial State Crown |
| Cullinan III & IV | 93.6 & 63.0 | Brilliant cuts | Unset in Crown Jewels |
| Golden Jubilee | 545.67 | Fancy yellow cushion | Royal Museum, Bangkok |
The Cullinan Legacy and Major Cut Stones
The Cullinan rough, weighing 3,106.75 carats, was mined in Premier Mine, South Africa, in 1905 and later presented to the British monarchy. The crystal was split and polished into multiple major stones, several of which remain among the largest and most famous diamonds in the world.
Largest Cut Diamond by Carat Weight
When judging by total carat weight among finished, polished diamonds that are publicly recognized, the Golden Jubilee Diamond stands as the largest cut diamond in existence. Cut from a brown rough crystal, it weighs 545.67 carats and is displayed at the Royal Museum in Bangkok.
Largest Diamond in the Crown Jewels
The Cullidan diamonds cut from the original rough remain central to British regalia, with Cullinan I set in the Sovereign’s Sceptre and Cullinan II mounted in the Imperial State Crown. These stones continue to attract global attention because of their size, clarity, and historic role.
How the Largest Cut Diamond Is Measured and Valued
Unlike commodities, exceptional diamonds are valued based on a combination of weight, color, clarity, cut quality, and historical significance. The Golden Jubilee is recognized for its considerable mass and unique golden hue, while the Cullinan stones are prized for their colorless clarity and prominent placement in national symbols.
Key Takeaways on the Largest Cut Diamond
- The Golden Jubilee Diamond at 545.67 carats is the largest cut diamond by weight that is currently recognized and displayed.
- The Cullinan I and Cullinan II remain the largest colorless diamonds in the Crown Jewels but are lighter than the Golden Jubilee.
- Size records in diamonds combine carat weight, cut quality, and historical significance, and can vary depending on whether rough or polished stones are compared.
- Public display locations, such as the Royal Museum in Bangkok, make these exceptional stones accessible for education and admiration.
FAQ
Reader questions
What is the name of the largest cut diamond in the world by carat weight?
The Golden Jubilee Diamond, weighing 545.67 carats, currently holds the record as the largest cut diamond by carat weight that is publicly displayed.
Is the Cullinan I larger than the Golden Jubilee Diamond?
No, Cullinan I weighs 530.20 carats, which is less than the 545.67 carats of the Golden Jubilee Diamond.
Where is the largest cut diamond in the world kept on display?
The Golden Jubilee Diamond is housed at the Royal Museum in Bangkok, Thailand, where it is accessible to the public and regularly featured in exhibitions.
Why is the Golden Jubilee Diamond important in diamond history?
It represents a singular polished stone with the highest recorded carat weight, showcasing advanced cutting techniques and a rare fancy yellow color that distinguishes it from colorless giants like the Cullinan stones.