1. Yifu Museum, China University of Geosciences, Wuhan 430074, China 2. Press Company, China University of Geosciences, Wuhan 430074, China 3. Gemology Institute, China University of Geosciences, Wuhan 430074, China
Abstract：Corallium elatius, which has unique color distribution characteristic, is the most important species of Taiwan precious corals. EPMA, XRD, FTIR and Laser Raman detective methods were used to study the chemical, mineral composition and spectra characteristics of Corallium elatius. The result of EPMA, XRD and FTIR shows the high-Mg calcite mineral component and the stable minor chemical constituents of the samples. Meanwhile, the cell parameter indicates the lattice distortion and the preferred orientation of calcite grain caused by organic matter. The red part of the samples shows a different Raman spectrum from that of the white part, located at 1 517/1 128 cm-1 and 1 296/1 016 cm-1. Raman scattering measurement reveals the relationship between the organic matter and color.
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