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2024

Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination

Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination. Journal of Gemmology, 2024, 39, 4, 338-350.

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Authors

  • H.A.O. Wang
  • M. Wälle
  • M.S. Krzemnicki
Research Articles
EmeraldGemmologyGeochemistryOrigins
Effects of Gamma Irradiation on Ruby and Pink Sapphire and Potential Detection Methods in Gem Labs
2023

Effects of Gamma Irradiation on Ruby and Pink Sapphire and Potential Detection Methods in Gem Labs

Keywords: Ruby, Pink sapphire, Gamma irradiation, UV-VIS, Raman, R-Line

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Authors

  • A. Mack
  • D. Weltz
  • H.A.O. Wang
  • M. Wälle
  • M.S. Krzemnicki
Research Articles
RubySapphireTreatments
2023

Further Characterisation of Native Copper Inclusions in Cu-Bearing Tourmaline

Further Characterisation of Native Copper Inclusions in Cu-Bearing Tourmaline. The Journal of Gemmology, 38(5), 427-429.

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Authors

  • D. Grolimund
  • D. Mathys
  • H.A.O. Wang
  • L. Franz
  • M.S. Krzemnicki
  • R. Schultz-Guttler
Research Articles
Tourmaline
2022

Paraiba or Not? Cu-bearing Tourmaline with a Distinct Fe Concentration

Paraiba or Not? Cu-bearing Tourmaline with a Distinct Fe Concentration. Published in Journal of Gemmology, 2022, 38 (1), 20-22.

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Authors

  • H.A.O. Wang
  • M.S. Krzemnicki
Research Articles
GeochemistryTourmaline
2021

Zircon inclusions in unheated pink sapphires from Ilakaka, Madagascar: A Raman spectroscopic study

Zircon inclusions in unheated pink sapphires from Ilakaka, Madagascar: A Raman spectroscopic study. Published in IGC 2021 Online Proceedings, 21-23. https://www.igc-gemmology.org/igc-2021-online  

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Authors

  • H.A.O. Wang
  • M.S. Krzemnicki
  • P. Lefevre
  • W. Zhou
Research Articles
GemmologyMethodsSapphireTreatments
2021

Cu-containing Thin Sheet Inclusion in Cu-bearing Tourmaline from Brazil

Cu-containing Thin Sheet Inclusion in Cu-bearing Tourmaline from Brazil. IGC 2021 Proceedings, 45-46.

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Authors

  • D. Grolimund
  • D. Mathys
  • H.A.O. Wang
  • L. Franz
  • M.S. Krzemnicki
  • R. Schultz-Guttler
Research Articles
Tourmaline
2021

Preliminary study of defocused PL measurements of diamonds

A study of nickel-bearing type Ia diamonds. IGC 2023 Proceedings, 37-39.

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Authors

  • H.A.O. Wang
  • J. Xaysongkham
  • J.-P. Chalain
  • L. Phan
  • L. Speich
  • M.S. Krzemnicki
Research Articles
Diamond
2021

New emeralds from Musakashi, Zambia, appear on the market

New emeralds from Musakashi, Zambia, appear on the market. The Journal of Gemmology, 37(8), 769-771.

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Authors

  • H.A.O. Wang
  • L.E. Cartier
  • M.S. Krzemnicki
Research Articles
Emerald
2021

SSEF introduces machine learning algorithm for data visualization

by Dr. H.A.O. Wang, first published in Facette 21 (June 2021) In January 2021, the Swiss Gemmological Institute SSEF published a scientific article in the Journal of Analytical Atomic Spectrometry (Figure 1) about multi-element analysis of gemstones and machine-learning-assisted data visualization, with a part

Authors

  • H.A.O. Wang
Research Blog
GemmologyMethods
2021

A New Type of Emerald from Afghanistan’s Panjshir Valley

A New Type of Emerald from Afghanistan’s Panjshir Valley. Published in Journal of Gemmology, 2021, 37 (5), 474-495.

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Authors

  • H.A.O. Wang
  • M.S. Krzemnicki
  • S. Bueche
Research Articles
EmeraldGeochemistryOrigins

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