Feature
Gems & Gemology, Summer 2010, Volume 46, No. 2

The Wittelsbach-Graff and Hope Diamonds: Not Cut from the Same Rough

Peer Reviewed Article
Eloïse Gaillou, Wuyi Wang, Jeffrey E. Post, John M. King, James E. Butler, Alan T. Collins, and Thomas M. Moses
×
How to cite this page
The Wittelsbach-Graff and Hope Diamonds: Not Cut from the Same Rough
Two historic blue diamonds, the Hope and the Wittelsbach-Graff, appeared together for the first time at the Smithsonian Institution in 2010. Both diamonds were apparently purchased in India in the 17th century and later belonged to European royalty. In addition to the parallels in their histories, their comparable color and bright, long-lasting orange-red phosphorescence have led to speculation that these two diamonds might have come from the same piece of rough. Although the diamonds are similar spectroscopically, their dislocation patterns observed with the DiamondView differ in scale and texture, and they do not show the same internal strain features. The results indicate that the two diamonds did not originate from the same crystal, though they likely experienced similar geologic histories.

You Might Also Like

Find a Retailer
learn more
Shop the Campus Store
Learn More
Quality Assurance Benchmarks
Learn More
Summer 2017 Gems & Gemology
G&G Summer 2017 Edition
Learn more