King's College London

Research portal

THE WITTELSBACH-GRAFF AND HOPE DIAMONDS: NOT CUT FROM THE SAME ROUGH

Research output: Contribution to journalArticle

Eloise Gaillou, Wuyi Wang, Jeffrey E. Post, John M. King, James E. Butler, Alan T. Collins, Thomas M. Moses

Original languageEnglish
Pages (from-to)80 - 88
Number of pages9
JournalGems & Gemology
Volume46
Issue number2
Published1 Jul 2010

King's Authors

Research Groups

  • Physics

Abstract

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 Diamond View 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.

View graph of relations

© 2018 King's College London | Strand | London WC2R 2LS | England | United Kingdom | Tel +44 (0)20 7836 5454