Abstract of Papers Presented at Annual Meeting of the Gemmological Society of Japan
2021 Annual Meeting
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Abstracts of Papers Presented at 2021 Online Meeting of the Gemmological Society of Japan
The effect of the heterogeneous layer secreted in the nacreous layer
*Junko Yazaki
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Pages 67

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Abstract

We observed the structure of three kinds of pearls which were cultured in Nagasaki Pref. this year. And we investigated there factor and occurring time.

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© 2021 The Gemmological Society of Japan
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