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Golden Jubilee Diamond 545.67 Carats

The Golden Jubilee Diamond was cut from   755.5 carats (151 g), found in the  Premier Mine in South Africa in 1985.

Until 1990, the diamond remained largely unknown to the outside world, requiring two years of work to bring it to its current state. A large surface, deep cracks from the interior, and several inclusions meant that cutting and polishing the large diamond presented challenges. De Beers considered this as an opportunity to test new cutting technologies.

 The Golden Jubilee was purchased from De Beers by a group of Thai business people in 1995.

It was arranged for the diamond to be given to King Bhumibol as a gift from the people to celebrate the 50th anniversary of the King's ascent to the throne. The diamond was named the Golden Jubilee, and was received by the King's daughter, Princess Maha Chakri Sirindhorn, on his behalf in 2000.

The diamond is now on display in the Royal Museum at Pimammek Golden Temple Throne Hall in Bangkok as part of the crown jewels.

The value of the Golden Jubilee diamond is believed to range between $4 and $12 million USD.]