Study on the Component and Distribution Characteristics of Needle-like Inclusions in Rose Quartz

Zhe HU; Ying GUO

doi:10.15898/j.cnki.11-2131/td.201709150152

2018 Vol. 37, No. 3

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Article navigation > Rock and Mineral Analysis > 2018 > 37(3): 306-312

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Zhe HU, Ying GUO. Study on the Component and Distribution Characteristics of Needle-like Inclusions in Rose Quartz[J]. Rock and Mineral Analysis, 2018, 37(3): 306-312. doi: 10.15898/j.cnki.11-2131/td.201709150152

Citation:

Zhe HU, Ying GUO. Study on the Component and Distribution Characteristics of Needle-like Inclusions in Rose Quartz[J]. Rock and Mineral Analysis, 2018, 37(3): 306-312. doi: 10.15898/j.cnki.11-2131/td.201709150152

Study on the Component and Distribution Characteristics of Needle-like Inclusions in Rose Quartz

Zhe HU,
Ying GUO^,

School of Gemmology, China University of Geosciences(Beijing), Beijing 100083, China

More Information

Corresponding author: Ying GUO, guoying@cugb.edu.cn

Received Date: 15 September 2017

Revised Date: 24 March 2018

Accepted Date: 07 May 2018

Abstract

Abstract

BACKGROUND The needle-like inclusions in rose quartz are considered to be rutile or dumortierite, and their orientation is related to the c-axis. However, there is no consensus on this statement. OBJECTIVES To find out the distribution characteristics and component of needle-like inclusions in rose quartz using multiple methods. METHODS Four starlight powder crystals containing acicular inclusions were selected, observed and tested using gemological Microscopes, Laser Raman Spectroscopy, and Ultraviolet-visible Absorption Spectroscopy. RESULTS The Raman experiments show that the characteristic vibration peaks 949 cm^-1 and 999 cm^-1 of needles match those of dumortierite and the needle-like inclusions are dumortierite or minerals similar to dumortierite. Magnification examination reveals that the inclusions are approximately 0.5 μm in diameter, with a length of up to millimeters, a near-directional distribution, and a convergent shape as a whole. They can be roughly divided into three groups at certain positions. The needle-like inclusions in the same group are distributed approximately parallel. The three blue-ray lines of six-pointed starlights intersected three-dimensionally, and no obvious three-dimensional symmetry was observed. It was not directly related to the crystallization habit of crystals. CONCLUSIONS It is believed that blue-ray stones form inclusions first and are captured during the growth of crystals. The UV-visible Spectroscopic Spectrum only absorbs the pink dumortierite, indicating that a large number of pink dumortierite inclusions contribute to the pinkness of the pink crystal.
- rose quartz /
- needles /
- dumortierit /
- Laser Raman Spectroscopy /
- Ultraviolet-visible Absorption Spectroscopy

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References

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