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Oppenheimer Diamond

The 253.7-carat Oppenheimer Diamond is in the shape of an octahedron (an eight-sided double pyramid), which is the common shape for diamond crystals. This diamond is 3.8 cm (1.5 in) in height and was discovered at the Dutoitspan Mine near Kimberley, South Africa in 1964. The Oppenheimer Diamond is unusual because diamonds of its size are rarely left uncut. It is named in honor of Sir Ernest Oppenheimer former chairman of the Board of Directors of DeBeers Consolidated Mines.

Image Number: 95-40349
Catalog Number: 117538
Weight: 253.7 carats
Gift of Harry Winston, Inc. , 1964
Locality: Dutoitspan Mine, Kimberley , South Africa

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Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits