The Heart of Eternity is a diamond measuring 27.64 carats (5.528 g), rated in color as "Fancy Vivid Blue" by the Gemological Institute of America. The Heart of Eternity was cut by the Steinmetz group, who owned the diamond before selling it to the De Beers Group. The Heart of Eternity is a member of an exceedingly rare class of colored diamonds. It was found in the Premier Diamond Mine of South Africa. Blue diamonds account for less than 0.1% of the output of the Premier mine,citation needed which is the only mine in the world with an appreciable production of blue diamonds. Of the ten colored diamonds that drew the highest bids, six of those ten were blue diamonds, rating values as high as $550,000 to $580,000 per carat ($2750–2900/mg).specify
During its exhibition at the Smithsonian,specify the Heart of Eternity was noted to be on loan from a private collector, giving rise to speculation that it was sold sometime during the exhibition at the Millennium Dome in London.citation needed References
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