What is the Golden Jubilee Diamond?
By Jared James · Last updated 21 May 2026
Definition
The Golden Jubilee Diamond is the largest cut and faceted diamond in the world, weighing 545.67 carats. It was discovered in the Premier Mine in South Africa in 1985 as a 755.5-carat rough stone and was cut by master cutter Gabi Tolkowsky, who also cut the Centenary Diamond, into a fire rose cushion cut that enhanced its warm brownish-yellow colour. The stone was given to the King of Thailand in 1997 to mark the golden jubilee of his reign, and it is now part of the Thai Crown Jewels.
Frequently asked questions
- How big is the Golden Jubilee Diamond?
- It weighs 545.67 carats, making it the largest cut and faceted diamond on record, surpassing the Cullinan I at 530.2 carats. It began as a 755.5-carat rough before being shaped into its current fire rose cushion cut.
- What colour is the Golden Jubilee Diamond?
- It is a warm brownish-yellow, sometimes described as golden, which is how it got its name. The fire rose cushion cut was chosen specifically by cutter Gabi Tolkowsky to make the most of that warm colour.
- Where is the Golden Jubilee Diamond now?
- It is part of the Thai Crown Jewels, having been presented to King Bhumibol Adulyadej of Thailand in 1997 to celebrate the fiftieth anniversary of his accession. It is currently kept in the Royal Museum in Bangkok.
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