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Proceedings Paper

Identification of gemstone treatments with Raman spectroscopy
Author(s): Lore Kiefert; Henry A. Haenni; Jean-Pierre Chalain
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Paper Abstract

The newest gemstone treatment concerns brownish diamonds of type IIa. These can be improved to near colorless by an enhancement process developed by General Electric, USA, using high temperature and pressure. A comparison of Raman spectroscopic features in the visible area (luminescence bands) of both treated and untreated colorless diamonds is given. Finally, examples of artificially colored peals and corals and their detection with Raman spectroscopy are shown.

Paper Details

Date Published: 29 September 2000
PDF: 11 pages
Proc. SPIE 4098, Optical Devices and Diagnostics in Materials Science, (29 September 2000); doi: 10.1117/12.401634
Show Author Affiliations
Lore Kiefert, SSEF Swiss Gemmological Institute (Switzerland)
Henry A. Haenni, SSEF Swiss Gemmological Institute (Switzerland)
Jean-Pierre Chalain, SSEF Swiss Gemmological Institute (Switzerland)

Published in SPIE Proceedings Vol. 4098:
Optical Devices and Diagnostics in Materials Science
David L. Andrews; David L. Andrews; Toshimitsu Asakura; Suganda Jutamulia; Wiley P. Kirk; Max G. Lagally; Ravindra B. Lal; James D. Trolinger, Editor(s)

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