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Proceedings Paper

The contribution of Cu2+, Fe2+, Fe3+ to bluish green color of HuBei turquoise
Author(s): Ying Guo; Lili Jin; Hongjuan Sun
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Paper Abstract

Cu2+, Fe2+ and Fe3+ of 146 pieces of turquoises from ZhuShan, HuBei province are researched of their contribution to the color of bluish green. Without consideration of its mineral water on the effects of color chroma, the content of these three cations are confirmed by chemical composition analysis, and then their specific contribution to lightness, chroma and hue are quantified within the uniform color space CIE L*a*b*. Consequently, it is considered that Cu2+ determines turquoise's vivid blue, and Fe2+ makes color changed to green and improves the chroma slightly, as a result it enhances the visual appearance a little too; while Fe3+ leads to red and yellow tone and makes chroma descended simultaneously, with its increment, the color appears low saturated brown, and then the color quality reduced.

Paper Details

Date Published: 12 November 2010
PDF: 9 pages
Proc. SPIE 7844, Semiconductor Lasers and Applications IV, 784412 (12 November 2010);
Show Author Affiliations
Ying Guo, China Univ. of Geosciences (China)
Lili Jin, China Univ. of Geosciences (China)
Hongjuan Sun, China Building Material Test & Certification Ctr. (China)

Published in SPIE Proceedings Vol. 7844:
Semiconductor Lasers and Applications IV
Ning-Hua Zhu; Jinmin Li; Farzin Amzajerdian; Hiroyuki Suzuki, Editor(s)

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