合成扩散星光刚玉的物理性质及成因探讨

黄凤鸣; 刘慧芳; 李娅莉; 毛晓飞

Volume 28 Issue 3

May 2003

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Article Navigation > Earth Science > 2003 > 28(3): 255-260

HUANG Feng-ming, LIU Hui-fang, LI Ya-li, MAO Xiao-fei, 2003. Physical Properties and Origins of Synthetic and Diffused Star Corundum. Earth Science, 28(3): 255-260.

Citation:

HUANG Feng-ming, LIU Hui-fang, LI Ya-li, MAO Xiao-fei, 2003. Physical Properties and Origins of Synthetic and Diffused Star Corundum. Earth Science, 28(3): 255-260.

HUANG Feng-ming, LIU Hui-fang, LI Ya-li, MAO Xiao-fei, 2003. Physical Properties and Origins of Synthetic and Diffused Star Corundum. Earth Science, 28(3): 255-260.

Citation:

HUANG Feng-ming, LIU Hui-fang, LI Ya-li, MAO Xiao-fei, 2003. Physical Properties and Origins of Synthetic and Diffused Star Corundum. Earth Science, 28(3): 255-260.

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Physical Properties and Origins of Synthetic and Diffused Star Corundum

1.
Gemmological Institute, China University of Geosciences, Wuhan 430074, China
2.
Testing Center, China University of Geosciences, Wuhan 430074, China

Received Date: 2002-11-06
Publish Date: 2003-05-25

Abstract

Abstract

This paper analyzes the chemical composition and physical properties of three star corundum specimens based on routine gemmological tests, electronic probe analysis and ultraviolet-visible spectrum analysis. In addition, the authors analyze the origin of star corundum. The observations show that the tested three specimens appear orange-red, brownish red and mauve and have relatively high transparency. Under strong reflected light, these three specimens exhibit cloudy surface features. The star lines from the surface of the stones are diffused and curved. At the intersection of the star lines, a bright light area can be seen. Through a microscope, these three specimens show well-developed pits and mocks. Two specimens show poorly-defined fibrous aluminum titanate inclusions, but one shows melted surface. All of these features indicate that the fibrous aluminum titanate inclusions seen in these three specimens may be produced by diffusion at a high temperature but annealing after being synthesized. All of these three specimens show obvious closed-arranged curved growth striations, indicating an origin of flame fusion. The electronic probe analysis results, absorption spectrum observations and ultraviolet-visible spectrum analysis give a Cr coloring element for these three specimens. Therefore, these three specimens should be named star ruby, and the color is caused by the synthesis but diffusion origin. However, the asterism is caused by the reflection from fibrous aluminum titanate inclusions produced by diffusion.
- synthesis,
- diffusion,
- asterism,
- corundum,
- ruby

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致谢: 本文所研究的样品由新加坡陈材琨先生赠送给珠宝学院.研究过程中, 珠宝学院的亓利剑副教授给予了大力的支持和帮助, 杨明星副教授帮助拍摄了部分照片, 新加坡宝石学院曾春光先生提供了样品的市场信息, 在此对他们表示衷心的感谢.

References(15)

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