The largest faceted diamond in the world, at 545 carats, the Golden Jubilee outweighs even the historic Cullinan I diamond by 15 carats, but, surprisingly, is not terribly famous, despite its size and importance.
It was discovered in 1985, in the Premier Mine in South Africa, the same mine that produced the Cullinan Diamond in 1905, and also the Taylor-Burton Diamond (1966) and the Centenary Diamond (1986).
Its first name was the very mundane “Unnamed Brown”. The cutting was overseen by Gaby Tolkowsky using tools and techniques that had been developed for cutting the above mentioned Centenary Diamond. Cutting took two years; the diamond was cut into a fire rose cushion cut. It was used to celebrate De Beer’s Centennial in 1988.
It was purchased from De Beers by Harry Ho in 1995. Ho had the diamond blessed by Pope John Paul II, and also the Buddhist Supreme Patriarch and the Supreme Immam of Thailand.
The diamond was named by the Thai King, and given to him on the 50th anniversary of his coronation.
It is currently located in Thailand, in Bangkok’s Royal Museum.