The contribution of Cu2+, Fe2+, Fe3+ to bluish green color of HuBei turquoise

Ying Guo; Lili Jin; Hongjuan Sun

doi:10.1117/12.870669

12 November 2010 The contribution of Cu²⁺, Fe ²⁺, Fe ³⁺ to bluish green color of HuBei turquoise

Ying Guo, Lili Jin, Hongjuan Sun

Proceedings Volume 7844, Semiconductor Lasers and Applications IV; 784412 (2010) https://doi.org/10.1117/12.870669
Event: Photonics Asia 2010, 2010, Beijing, China

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.

Citation Download Citation

Ying Guo, Lili Jin, and Hongjuan Sun "The contribution of Cu²⁺, Fe ²⁺, Fe ³⁺ to bluish green color of HuBei turquoise", Proc. SPIE 7844, Semiconductor Lasers and Applications IV, 784412 (12 November 2010); https://doi.org/10.1117/12.870669

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