Gems & Gemology Vol. 56 Issue 1 (Spring 2020)

Author : Gemological Institute of America

In our lead article, authors Emily Dubinsky, Jennifer Stone-Sundberg, and John Emmett illuminate the chemistry behind gem corundum’s rich array of colors to reveal the influence of the concentrations of the six identified chromophores found in natural corundum on the depth of color. The authors use quantitative visible absorption spectroscopy and chemical analysis by secondary-ion mass spectrometry (SIMS) to study specially chosen synthetic and natural corundum samples to calculate each chromophore’s absorption cross section. This information is presented as spectra and color-circle arrays, which we hope practicing gemologists will find informative.

Issued Date : 24 May 2021
Page : 195
Publisher : Gemological Institute of America Inc. (GIA)
Category : Gems & Gemology
Available : Unlimited

MARC INFORMATION

245 a : Title 
Gems & Gemology Vol. 56 Issue 1 (Spring 2020) 
520 a : Description 
In our lead article, authors Emily Dubinsky, Jennifer Stone-Sundberg, and John Emmett illuminate the chemistry behind gem corundum’s rich array of colors to reveal the influence of the concentrations of the six identified chromophores found in natural corundum on the depth of color. The authors use quantitative visible absorption spectroscopy and chemical analysis by secondary-ion mass spectrometry (SIMS) to study specially chosen synthetic and natural corundum samples to calculate each chromophore’s absorption cross section. This information is presented as spectra and color-circle arrays, which we hope practicing gemologists will find informative. 
300 a : Total pages 
195 
020 a : ISSN 
0016-626X 
260 b : Name of publisher 
Gemological Institute of America Inc. (GIA) 
050 b : Published Year 
2020 

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