1981年11月7—14日,我应邀出席了在日本东京—贤岛—京都召开的第十八届国际宝石学会议。这次会议是由日本全国宝石学协会主办的。出席的代表计60人左右。国际宝石学会议已有卅多年历史。这次会议共报告了四十多篇论文,主要是有关各国新发现的天然宝石矿床地质、地球化学特征及宝石的矿物学研究,约占全部报告的一 From November 7 to November 14, 1981, I was invited to attend the 18th International Gemological Symposium held in Tokyo -Kashima-Kyoto, Japan. This meeting is sponsored by the Japan Gemmological Association. About 60 delegates attended the meeting. The International Gemological Conference has had many years of history. A total of more than 40 papers were reported during the conference, mainly on the geology and geochemistry characteristics of the newly discovered natural gem mineral deposits in various countries and the mineralogical studies of precious stones, accounting for about one