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5.51
carats
Central Africa
Loaned by Cora Diamond Corp.
Most diamonds of this hue have been artificially colored in the laboratory.
But this stunning diamond was colored naturally. Radiation in the
Earth caused defects in the atomic structure that gave rise to the
blue-green color. The gem’s strong color and large size are
highly unusual. Photo credit for photograph
of
The Ocean Dream
The Gemological Institute of America
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