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2024

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

Gemmological Characterisation of Emeralds from Musakash […]

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Authors

  • H.A.O. Wang
  • M. Wälle
  • M.S. Krzemnicki
Research Articles
EmeraldGemmologyGeochemistryOrigins
2024

Afghanite of Exceptional Size and Quality from Badakhshan, Afghanistan

Afghanite of Exceptional Size and Quality from Badakhsh […]

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Authors

  • C. Rochd
  • M.S. Krzemnicki
Research Articles
Gemmology
Dehydration of Diaspore and Goethite during Low-Temperature Heating as Criterion to Separate Unheated from Heated Rubies and Sapphires
2023

Dehydration of Diaspore and Goethite during Low-Temperature Heating as Criterion to Separate Unheated from Heated Rubies and Sapphires

Dehydration of Diaspore and Goethite during Low-Tempera […]

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Authors

  • G. Spiekermann
  • J. Braun
  • M.S. Krzemnicki
  • P. Lefevre
  • W. Zhou
Research Articles
RubySapphireTreatments
2023

A study of nickel-bearing type Ia diamonds

A study of nickel-bearing type Ia diamonds. IGC 2023 Pr […]

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Authors

  • J.-P. Chalain
  • L. Phan
  • M. Mintrone
Research Articles
DiamondGemmology
2023

Phase transformations as important markers for heat treatment detection in corundum and other gemstones

Phase transformations as important markers for heat treatment detection in corundum and other gemstones. IGC 2023 Proceedings, 111-113.

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Authors

  • M.S. Krzemnicki
  • P. Lefevre
  • W. Zhou
Research Articles
Other Gemstones
2023

Purple to bluish grey chalcedony from Ethiopia

In the past 15 years, Ethiopia has repeatedly gained attention for a variety of new gem finds. In 2008, a large deposit of white play-of-colour opal was found (Rondeau et al., 2010), followed by black opal with play-of-colour in 2013 (Kiefert et al., 2014).

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Authors

  • J. Fiedler
  • L. Kiefert
  • M. Furuya
  • M.S. Krzemnicki
  • T. Sintayehu
Research Articles
Other Gemstones
2023

DNA Fingerprinting and age dating of historic natural pearls: a combined approach

DNA Fingerprinting and age dating of historic natural pearls: a combined approach. IGC 2023 Proceedings, 157-158.

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Authors

  • B. Lendvay
  • J.B. Meyer
  • L.E. Cartier
  • M.S. Krzemnicki
  • N.V. Morf
Research Articles
DNAPearl
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 […]

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Authors

  • D. Grolimund
  • D. Mathys
  • H.A.O. Wang
  • L. Franz
  • M.S. Krzemnicki
  • R. Schultz-Guttler
Research Articles
Tourmaline
2023

Petrology, geothermobarometry and geochemistry of granulite facies wall rocks and hosting gneiss of gemstone deposits from the Mogok area (Myanmar)

Petrology, geothermobarometry and geochemistry of granu […]

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Authors

  • C. de Capitani
  • L. Franz
  • M.M. Phyo
  • M.S. Krzemnicki
  • R.L. Romer
  • W.A. Balmer
Research Articles
Gemmology

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