Abstract of Papers Presented at Annual Meeting of the Gemmological Society of Japan
2017 Annual Meeting
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Host: The Gemmological Society of Japan

Abstracts of Lectures at 2017 Annual Meeting of the Gemmological Society of Japan
Chemical characteristics of carbonaceous materials involved in the formation of Herkimer Diamond
*Shigenori OGIHARA
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Keywords: anthraxolite, dolostone, Herkimer Diamond, inclusion, Raman spectrometry
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Abstract

In order to know the origin of Herkimer Diamond, powder X - ray diffraction was performed on the black substance (anthraxolite) coating the inside of the cavity. As a result, only reflection of graphite was observed. The black substance is graphite, not hydrocarbon. By Raman spectroscopy, it was found that the maximum temperature of graphite experienced was 200 degrees.

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© 2017 The Gemmological Society of Japan
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