Abstract of Papers Presented at Annual Meeting of the Gemmological Society of Japan
2019 Annual Meeting
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Abstracts of Lectures at 2019 Annual Meeting of the Gemmological Society of Japan
Fluorescence of Diamond
*Hidemaru Ogawa
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Pages 7

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Abstract

Diamond emits characteristic fluorescence due to optical defects and impurities. Inspection using fluorescence is a very important item in gem identification, such as a method of visually observing fluorescence to ultraviolet light, fluorescence image analysis with DiamondViewTM, and measurement with an optical instrument. A natural pink diamond and a synthetic pink diamond show distinctive fluorescence. The wavelength distribution of the fluorescence was measured with a fluorescence spectrofluorometer. The excitation wavelength having the maximum fluorescence spectrum and the change in the fluorescence spectrum due to the fluctuation of the excitation wavelength was observed by measuring the 3D fluorescence spectrum.

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© 2019 The Gemmological Society of Japan
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