Identification of the Endangered Pink-to-Red Stylaster Corals by Raman Spectroscopy - Archive ouverte HAL Access content directly
Journal Articles Gems & Gemology : the quarterly journal of the Gemological Institute of America Year : 2009

Identification of the Endangered Pink-to-Red Stylaster Corals by Raman Spectroscopy

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Abstract

All corals within the Stylasteridae family (including the Stylaster genus) are listed in Appendix II of CITES; this means they are protected and their trade requires an export permit, unlike corals from the Corallium genus, which include most pink-to-red corals used in jewelry. Raman scattering demonstrates that corals from the Stylaster genus contain carotenoid pigments (polyenic pigments substituted with methyl groups), whereas those from the Corallium genus are colored by unmethylated polyenic pigments. Additionally, Stylaster corals are made of aragonite, whereas those from Corallium are composed of calcite. Through Raman scattering analysis, the fully protected Stylaster pink-to-red corals may be distinguished from this other type of gem coral.
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hal-00432313 , version 1 (18-11-2022)

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Attribution - NonCommercial - CC BY 4.0

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  • HAL Id : hal-00432313 , version 1

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Stefanos Karampelas, Emmanuel Fritsch, Benjamin Rondeau, Aude Andouche, Bernard Métivier. Identification of the Endangered Pink-to-Red Stylaster Corals by Raman Spectroscopy. Gems & Gemology : the quarterly journal of the Gemological Institute of America, 2009, 45 (1), pp.48-52. ⟨hal-00432313⟩
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