The Ocean Dream was displayed as part of the Smithsonian's "The Splendor of Diamonds" exhibit, alongside the De Beers Millennium Star, The Heart of Eternity and the Moussaieff Red.
The Ocean Dream is the first and one of the only natural diamonds known to the GIA to possess a blue-green hue (besides the Ocean Paradise Diamond owned by the Nahshonov Group, found in Brazil in 2012), making it one of the rarest diamonds in the world. (A blue-green color is commonly seen in artificially enhanced diamonds, whose color is imparted by various irradiation methods.) After careful study, the GIA concluded that its distinct hue is a result of millions of years of exposure to natural radiation. The Ocean Dream originated in Central Africa, and is currently owned by the Cora Diamond Corporation.
On view together for the first time are 7 of the world's rarest diamonds representing a range of sizes and a rainbow of colors -- red, orange, yellow, pink, blue, blue-green, and colorless. All grew from carbon atoms deep within the earth and endured an explosive journey to the Earth's surface. The colorless diamonds are composed purely of carbon atoms. The rare colors of the others resulted from impurities that replaced some of the carbon atoms during growth.
These diamonds were found since 1980 and are on loan from their owners:
The De Beers Millennium Star (203.04 carats), 6th-largest colorless diamond is on view through Sept. 1.
An unnamed (103 carats) colorless, cushion-cut diamond is on view Sept. 2-30.
The Allnatt (101.29 carats), a yellow diamond.
The Steinmetz Pink (59.60 carats), largest pink diamond.
The Heart of Eternity (27.64 carats), a blue diamond.
The Pumpkin Diamond (5.54 carats), one of the largest orange diamonds.
The Ocean Dream (5.51 carats), the largest blue-green diamond.
The Moussaieff Red (5.11 carats), the largest red diamond.