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Akademický článek

Exploring emerald global geochemical provenance through fingerprinting and machine learning methods

Autor: Raquel Alonso-Perez, James M.D. Day, D. Graham Pearson, Yan Luo, Manuel A. Palacios, Raju Sudhakar, Aaron Palke

Publikováno v: Artificial Intelligence in Geosciences, Vol 5, Iss , Pp 100085- (2024)

Emeralds – the green colored variety of beryl – occur as gem-quality specimens in over fifty deposits globally. While digital traceability methods for emerald have limitations, sample-based approaches offer robust alternatives, particularly for d

Externí odkaz: https://doaj.org/article/024b17f7846d46cdada392bc2030ed6f

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Akademický článek

Study of 405 nm Laser-Induced Time-Resolved Photoluminescence Spectroscopy on Spinel and Alexandrite

Autor: Wenxing Xu, Tsung-Han Tsai, Aaron Palke

Publikováno v: Minerals, Vol 13, Iss 3, p 419 (2023)

Research on photoluminescence spectroscopy on Cr-doped gem materials has demonstrated great success regarding the identification of gemstones in terms of building rapid test systems. In this study, 405 nm photoluminescence spectroscopy was used to me

Externí odkaz: https://doaj.org/article/94c0dfc55a874a938ba9aa4e80711055

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Akademický článek

Identification of Opaque Sulfide Inclusions in Rubies from Mogok, Myanmar and Montepuez, Mozambique

Autor: Wim Vertriest, Aaron Palke

Publikováno v: Minerals, Vol 10, Iss 6, p 492 (2020)

The red variety of corundum owes its color and strong fluorescence to the presence of Cr, as well as traces of Fe. The latter can reduce the fluorescence and thus impact the appearance of the final gem. Gem quality rubies are rarely available for sci

Externí odkaz: https://doaj.org/article/bece3738363443518b4e56fb1cdd691d

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