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Smithsonian National Museum of Natural History
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Phosphoresence of the Hope Diamond

Curator Dr. Jeffrey Post led a team from the Smithsonian and the U.S. Naval Research Laboratory to investigate the intense, red-orange phosphorescence exhibited by the Hope Diamond after exposure to ultra-violet light. They discovered that all type IIB blue diamonds exhibit similar phosphorescence behaviors and that the specific phosphorescence spectral properties might be unique to each individual blue diamond, enabling the researchers to essentially “fingerprint” each stone.

Creator Chip Clark
Photo ID 2009-49657
Source Smithsonian Institution

The Hope Diamond phosphoresces red under ultraviolet light

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