Spectroscopic characterization of yellow gem quality CVD diamond

Johnson, P.; Moe, K.S.; Persaud, S.; Odake, S.; Kazuchits, N.M.; Zaitsev, A.M.

doi:10.1016/j.diamond.2023.110505

Diamond and Related Materials

2023

DOI: 10.1016/j.diamond.2023.110505

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Spectroscopic characterization of yellow gem quality CVD diamond

P. Johnson,

K.S. Moe,

S. Persaud

et al.

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2024

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Cited by 1 publication

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Multi-excitation photoluminescence spectroscopy system for gemstone analysis

Tsai,

D’Haenens-Johansson,

Smith

et al. 2024

Opt. Express

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Luminescence spectra can reveal important chemical and structural information that can be used for gemstone characterization and identification. Traditionally, gemstone UV-excited luminescence is evaluated visually under mercury vapor lamp illumination. This approach is limited by several factors, including the mixture of mercury’s emission peaks, possible filter degradation, an inability to separate overlapping emission features, and the sensitivity and subjectivity of human vision and color interpretation. A multi-excitation photoluminescence (PL) spectroscopy system has been built for gemstone analysis, incorporating 261 and 405 nm laser excitations to study gemstone emission features between 270 to 1000 nm. This system presents significant improvements, extending the detection spectral range, increasing the sensitivity, accuracy and reproducibility of gemstone luminescence analysis. Luminescence analysis of commercially valuable gemstones are presented to demonstrate the system’s suitability for gemstone identification. Examples include distinguishing natural from laboratory-grown diamonds, thermal and color treatment detection for corundum and pearls, respectively, and mineral type separation of emeralds and other green gemstones.

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Multi-excitation photoluminescence spectroscopy system for gemstone analysis

Tsai,

D’Haenens-Johansson,

Smith

et al. 2024

Opt. Express

View full text Add to dashboard Cite

show abstract

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Spectroscopic characterization of yellow gem quality CVD diamond

Cited by 1 publication

References 30 publications

Multi-excitation photoluminescence spectroscopy system for gemstone analysis

Multi-excitation photoluminescence spectroscopy system for gemstone analysis

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