DE BEERS CENTENARY DIAMOND – $100 MILLIONS
At 273.85 carats, the De Beers Centenary diamond is the third largest from the Premier Mine, the same one that produced the Cullinan Diamond. The original was an astounding 599 carats, though. Flawless both internally and externally, it has the highest Grade D color rating by the Gemological Institute of America. It got its name after being presented in its original form for the Centennial Celebration of De Beers Consolidated Mines on May 11, 1988. It was unveiled in its present glory in May 1991 in its modified heart shaped brilliant cut. Apparently, De Beers no longer owns it, though it refuses to comment on its present whereabouts citing privacy policies.
