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Golden Jubilee Diamond

The "Golden Jubilee Diamond" was found in the Premier Mine, which is also the origin of the Cullinan diamond (1905) and other notables such as the Taylor–Burton (1966) and the Centenary(1986). The Golden Jubilee Diamond which is the largest cut and faceted diamond in the world weighs around 545.67 carats (109.13 g). It weighs greater than the Cullinan I by 15.37 carats (3.07 g). Cullinan I, is also known as the Great Star of Africa. Since 1908, Cullinan I had held the title of the largest cut and faceted diamond.

HISTORY

The In 1985, the Golden Jubilee Diamond was found in the found in the prolific blue ground of the Premier Mine in South Africa. It was cut from a large brown diamond which was first known as the "Unnamed Brown" weighs about 755.5 carats (151 g). For the purpose of testing special tools and cutting methods, the Golden Jubilee diamond was given to Gabriel Tolkowsky by De Beers that had been improved for use on the colourless D-colour Centenary.

As it had deep cracks and several inclusions, the Golden Jubilee Diamond was cut in underground room which is designed specially that is free from vibrations. This Yellow-Brown-Diamond was changed through a fire rose cushion cut. Until 1990, the diamond remained largely unknown to the outside world, requiring two years to bring it to its current state. The Thai Diamond Manufacturers Association brought the unnamed diamond to Thailand which is to be exhibited in the Thai Board of Investment Exhibition in Laem Chabang. In 1988, it was selected to herald De Beer's centennial celebrations. In 1995, the Golden Jubilee was purchased from De Beers by a group which was led by Henry. De Beers considered and used this as an opportunity to test new cutting technologies and methods.