Published September 1992
| public
Journal Article
Unstable Radiation-Induced Yellow-Green Color in Grossular Garnet
Chicago
An error occurred while generating the citation.
Abstract
Although conventional wisdom has been that irradiation will not alter the color of garnets, exposure of some colorless to pale-hued African grossulars to either ^(60)Co or ^(137) Cs gamma rays turns them light yellow-green. The resulting color is unstable and fades within hours to days in sunlight, and within weeks in the dark. The spectra of the radiation-enhanced garnets differ from those of similar-appearing naturally colored grossulars. In the dark, the irradiation-related absorption features undergo two stages of fading: an initial period of relatively rapid fading, followed by a longer period of slow fading. In daylight, a single rate of even faster fading is observed.
Additional Information
© 1992 Gemological Institute of America. The authors are grateful to the following for supplying material for this study: Gene Dente of the Serengeti Co., San Diego, California, on whose specimens this phenomenon was first observed; Peter Flusser of Overland Gems, Los Angeles, California; H. Lind Edelsteinschleiferei, Idar-Oberstein, Germany; The Royal Ontario Museum, Toronto, Ontario, Canada; and the Gemological Institute of America, Santa Monica, California.Additional details
- Eprint ID
- 38853
- Resolver ID
- CaltechAUTHORS:20130607-111032586
- Created
-
2013-06-25Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)