Raman spectra of gem-quality variscite and metavariscite
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Raman Spectroscopy"
DOI: 10.1002/jrs.5117
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… read more here.
Keywords: gem quality; spectra gem; raman; raman spectra ... See more keywords
Evidence for large scale fractionation of carbon isotopes and of nitrogen impurity during crystallization of gem quality cubic diamonds from placers of North Yakutia
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DOI: 10.1134/s001670291711009x
Abstract: The spatial distribution of carbon and nitrogen isotopes and of nitrogen concentrations is studied in detail in three gem quality cubic diamonds of variety II according to Orlov’s classification. Combined with the data on composition… read more here.
Keywords: gem quality; carbon; isotopes nitrogen; cubic diamonds ... See more keywords
Gemology, Mineralogy, and Spectroscopy of Gem-Quality Diopside from Pakistan and Russia: New Insights for the Chromogenic Mechanism and Possible Origin
Sign Up to like & getrecommendations! Published in 2023 at "Crystals"
DOI: 10.3390/cryst13050727
Abstract: Green diopside is currently popular in the jewelry market due to its attractive color and excellent transparency. Gem-quality diopsides are mainly sourced from Pakistan, Italy, Russia, and other places. The color, geographic origin, and formation… read more here.
Keywords: mineralogy; spectroscopy; pakistan russia; gem quality ... See more keywords