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Premier Mine

The Steinmetz Sirius

The Steinmetz Sirius (not to be confused with Sirius Star®…the world’s brightest diamond®) is a 103.83 carat D IF cushion shaped diamond mined from the legendary Premier mine in South Africa. This legendary cushion shaped stone is claimed to be one of the largest D colored, internally flawless diamonds to ever appear at auction and is only […]

Niarchos

The Niarchos is a 128.25 carat colorless, flawless pear shape named after the late Stavros Niarchos, the Greek shipping magnate. In the rough, it weighed 426.5 carat, internally flawless. It was slightly chipped, likely due to contact with the mine’s underground crusher. Sir Ernest Oppenheimer considered that it possessed the most perfect color of any diamond he had ever […]

The Iranian Yellows

The Iranian Yellows is a collection of diamonds that were acquired by Nasseridin Shah on a trip to Europe in 1889. These yellow diamonds are all South African in origin, and considering the year the diamonds were purchased, may have originated in the highly productive De Beers or Kimberley mines, that started production in the […]

De Beers Centenary Diamond

The De Beers Centenary Diamond is, at 273.85 carat, the third-largest diamond to have been produced in the Premier Mine. The Centenary Diamond is rated in color as grade D color by the GIA which is the highest grade of colourless diamond and is internally and externally flawless. It was named the Centenary Diamond as […]

Allnatt Diamond – a 101.29ct fancy vivid yellow

The Allnatt Diamond measures 101.29 carat with a cushion cut, rated in color as Fancy Vivid Yellow by the Gemological Institute of America. This diamond is named after one of its holders, Major Alfred Ernest Allnatt, a soldier, sportsman, art patron and benefactor. While it is not known precisely where the Allnatt originated, many experts believe […]

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