The De Beers Centenary Diamond is, at 273.85 carats (54.77 g), 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 Gemological Institute of America, which is the highest grade of colorless diamond and is internally and externally flawless. It was named the Centenary Diamond as it was presented in the rough for the Centennial Celebration of De Beers Consolidated Mines on May 11, 1988. The Centenary Diamond was unveiled in final form in May 1991.Wednesday, 13 April 2011
Centenary Diamond
The De Beers Centenary Diamond is, at 273.85 carats (54.77 g), 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 Gemological Institute of America, which is the highest grade of colorless diamond and is internally and externally flawless. It was named the Centenary Diamond as it was presented in the rough for the Centennial Celebration of De Beers Consolidated Mines on May 11, 1988. The Centenary Diamond was unveiled in final form in May 1991.
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