Several gem corals, belonging to the classes Hydrozoa and Anthozoa of the phylum Cnidaria, have been analyzed. These have been previously classified from a zoological point of view. In this paper surface structures, physical data, FTIR- and Raman-spectra of corals with gem potential have been investigated. Spectrophotometric characterisation proved to be a useful tool for determining the main features of the mineral phases (calcite or aragonite) and of the organic content in each sample. Chromophore complexes belonging to the caroteno-proteins of the carotenoid family also could be detected.
Gems corals : classification and spectroscopic features / V. Rolandi, A. Brajkovic, I. Adamo, R. Bocchio, M. Landonio. - In: AUSTRALIAN GEMMOLOGIST. - ISSN 0004-9174. - 22:7(2005), pp. 285-298.
Gems corals : classification and spectroscopic features
I. Adamo;R. BocchioPenultimo
;
2005
Abstract
Several gem corals, belonging to the classes Hydrozoa and Anthozoa of the phylum Cnidaria, have been analyzed. These have been previously classified from a zoological point of view. In this paper surface structures, physical data, FTIR- and Raman-spectra of corals with gem potential have been investigated. Spectrophotometric characterisation proved to be a useful tool for determining the main features of the mineral phases (calcite or aragonite) and of the organic content in each sample. Chromophore complexes belonging to the caroteno-proteins of the carotenoid family also could be detected.
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