Study on Star Spinel
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摘要: 常见尖晶石有六射或四射星光。对同时具有多组星光效应的尖晶石少见报道。利用常规宝石学技术、拉曼光谱技术和电子探针对具有多组六射星光和四射星光效应的尖晶石进行了研究,发现由于存在多组定向排列的针状包裹体,使尖晶石产生多组星光效应。利用电子探针的线扫描技术对产生星光效应的包裹体进行了初步研究,发现了两种化学成分的针状包裹体,其化学成分主要为Fe和Ca的化合物。Abstract: Four-pointed or six-pointed star sometimesKGcan be seen in a spinel, but it is rarely reported that there are multiple groups of asterism on the same spinel. In this article, the spinel with both four groups of six-pointed star and three groups of four-pointed star have been studied by means of conventional gemmological techniques, Raman spectroscopy and electron probe. The experiments indicate that there are multiple groups of paralleled needle-like inclusions in spinels, which result in the multiple groups of asterisms at the same spinel.
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Keywords:
- spinel /
- multiple groups of asterism /
- six-pointed star /
- four-pointed star
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[1] 张蓓莉.系统宝石学[M].北京:地质出版社,1997.214. [2] W L D R A Kurmaratilake. Spinel and garnet star network:An interesting asterism in gems from Sri Lanka[J]. Journal of Gemmology,1998,26(1):24-28.
[3] Rober Webster.Gems:their sources,description and identification (fourth edition)[M].London:Butterworth & Co-publishers Ltd,1983.136.
[4] 英国宝石协会和宝石检测实验室.宝石学教程[M].陈钟惠 等译,武汉:中国地质大学出版社,1992.204.
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