Raman spectra of gem‐quality variscite and metavariscite. (10th February 2017)

• Record Type: Journal Article
• Authors: Fritsch, Emmanuel; Karampelas, Stefanos; Mevellec, Jean‐Yves
• Other Names: Korsakov Andrey V. guestEditor.; Marshall Craig Patrick guestEditor.
• Is Part Of: Journal of Raman spectroscopy. Volume 48:Number 11(2017)
• Page Start: 1554
• Page End: 1558
• Publication Date: 2017-02-10
• Subjects: variscite -- metavariscite -- phosphate -- gem; Raman spectroscopy -- Periodicals; 535.846
• DOI: 10.1002/jrs.5117
• Languages: English
• ISSNs: 0377-0486

Abstract

Abstract : Raman spectra were obtained on a set of five gems presented as massive variscite, from the three major sources of this gem‐quality material. In parallel, micro‐FTIR in reflectance and chemical analysis were performed on the same samples, to further characterize them. Surprisingly, four out of five samples are found to be metavariscite, which has been documented in gem quality only once before. Results of micro‐FTIR in reflectance confirmed this result. Copyright © 2017 John Wiley & Sons, Ltd. Abstract : Raman spectra on a set of five gems presented as variscite from the three major gem sources known were acquired, along with infrared spectra and chemical analysis. Surprisingly, four out of five samples are found to be metavariscite, which has been documented in gem quality only once before. Results of micro‐FTIR in reflectance confirmed this result.