PD Dr. Michael Krzemnicki

Lendvay, B., Morf, N. V., Cartier, L. E., Krzemnicki, M. S., & Nonaka, M. (2025). Trace-DNA from a century-old holotype specimen resolves taxonomic uncertainties: the case of the Hawaiian pink precious coral (Pleurocorallium secundum), a CITES-listed species used in jewelry [Posted-content]. Cold Spring Harbor Laboratory. https://doi.org/10.1101/2025.03.06.641805

Krzemnicki, M. S., & Rochd, C. (2024). Orange Sodalite from Badakhshan, Afghanistan. Journal of Gemmology, 39(1), 20–22. https://doi.org/10.15506/jog.2024.39.1.20

Krzemnicki, Michael S., & Rochd, Chanya. (2024). Afghanite of Exceptional Size and Quality from Badakhshan, Afghanistan [Journal-article]. The Journal of Gemmology, 39(1), 7–8. https://doi.org/10.15506/jog.2024.39.1.7

Krzemnicki, Michael S., Wang, Hao A. O., Wälle, Markus, Lefèvre, Pierre, Zhou, Wei, & Cartier, Laurent E. (2024). Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination [Journal-article]. Journal of Gemmology, 39(4), 338–350. https://doi.org/10.15506/jog.2024.39.4.338

Krzemnicki, Michael S., Lefèvre, Pierre, Zhou, Wei, Braun, Judith, & Spiekermann, Georg. (2023). Dehydration of Diaspore and Goethite during Low-Temperature Heating as Criterion to Separate Unheated from Heated Rubies and Sapphires. Minerals, 13(12). https://doi.org/10.3390/min13121557

Krzemnicki, Michael S., Lefèvre, Pierre, Zhou, Wei, Braun, Judith, & Spiekermann, Georg. (2023). Dehydration of Diaspore and Goethite during low-Temperature Heating as Criterion to separate Unheated from Heated Rubies and Sapphires [Posted-content]. In Preprints.org. MDPI AG. https://doi.org/10.20944/preprints202309.1908.v1

Krzemnicki, M. S., Leuenberger, A., & Balmer, W. A. (2023). Cobalt-bearing Blue Spinel from Lukande, near Mahenge, Tanzania. Journal of Gemmology, 38(5), 474–493. https://doi.org/10.15506/jog.2023.38.5.474

Lendvay, B., Cartier, L. E., Costantini, F., Iwasaki, N., Everett, M. V., Krzemnicki, M. S., Kratzer, A., & Morf, N. V. (2022). Coral-ID: A forensically validated genetic test to identify precious coral material and its application to objects seized from illegal traffic. Forensic Science International: Genetics, 58. https://doi.org/10.1016/j.fsigen.2022.102663

Ahadnejad, V., Krzemnicki, M. S., & Hirt, A. M. (2022). Demantoid from Kerman Province, South-east Iran: A Mineralogical and Gemmological Overview. Journal of Gemmology, 38(4), 329–347. https://doi.org/10.15506/jog.2022.38.4.329

Krzemnicki, Michael S., & Wang, Hao A. O. (2022). Paraíba or Not? Cu-bearing Tourmaline with a Distinct Fe Concentration [Journal-article]. The Journal of Gemmology, 38(1), 20–22. https://doi.org/10.15506/jog.2021.38.1.20

Phyo, Myint M., Franz, Leander, Romer, Rolf L., de Capitani, Christian, Balmer, Walter A., & Krzemnicki, Michael S. (2022). Petrology, geothermobarometry and geochemistry of granulite facies wall rocks and hosting gneiss of gemstone deposits from the Mogok area (Myanmar). Journal of Asian Earth Sciences: X, 9, 100132. https://doi.org/10.1016/j.jaesx.2022.100132

Speich, L., Chalain, J.-P., & Krzemnicki, M. S. (2022). Synthetic Moissanite with the Reflectivity of Diamond. Journal of Gemmology, 38(4), 323–325. https://doi.org/10.15506/jog.2022.38.4.323

Xu, W., & Krzemnicki, M. S. (2021). Raman spectroscopic investigation of zircon in gem-quality sapphire: Application in origin determination. Journal of Raman Spectroscopy, 52(5), 1011–1021. https://doi.org/10.1002/jrs.6092

Wang, Hao A.O., Krzemnicki, Michael S., Büche, Susanne, Degen, Sarah, Franz, Leander, & Schultz-Guttler, Rainer. (2021, March 4). Multi-Element Correlation Analysis of Cu-bearing Tourmaline using LA-ICP-Time-Of-Flight-MS. EGU General Assembly 2021. https://doi.org/10.5194/egusphere-egu21-16170

Wang, H. A. O., & Krzemnicki, M. S. (2021). Multi-element analysis of minerals using laser ablation inductively coupled plasma time of flight mass spectrometry and geochemical data visualization using t-distributed stochastic neighbor embedding: Case study on emeralds. Journal of Analytical Atomic Spectrometry, 36(3), 518–527. https://doi.org/10.1039/d0ja00484g

Krzemnicki, M. S., Wang, H. A. O., & Büche, S. (2021). A New Type of Emerald from Afghanistan’s Panjshir Valley. Journal of Gemmology, 37(5), 1–22. https://doi.org/10.15506/jog.2021.37.5.474

Krzemnicki, M. S., Wang, H. A. O., & Cartier, L. E. (2021). New Emeralds from Musakashi, Zambia, Appear on the Market. Journal of Gemmology, 37(8), 769–771. https://doi.org/10.15506/jog.2021.37.8.769

Lendvay, Bertalan, Cartier, Laurent E., Gysi, Mario, Meyer, Joana B., Krzemnicki, Michael S., Kratzer, Adelgunde, & Morf, Nadja V. (2020). DNA fingerprinting: an effective tool for taxonomic identification of precious corals in jewelry. Scientific Reports, 10(1). https://doi.org/10.1038/s41598-020-64582-4

Cartier, L. E., Krzemnicki, M. S., Gysi, M., Lendvay, B., & Morf, N. V. (2020). A Case Study of Ivory Species Identification Using a Combination of Morphological, Gemmological and Genetic Methods. Journal of Gemmology, 37(3), 282–297. https://doi.org/10.15506/jog.2020.37.3.282

Phyo, Myint Myat, Wang, Hao A. O., Guillong, Marcel, Berger, Alfons, Franz, Leander, Balmer, Walter A., & Krzemnicki, Michael S. (2020). U-Pb dating of zircon and zirconolite inclusions in marble-hosted gem-quality ruby and spinel from Mogok, Myanmar. Minerals, 10(2), 195. https://doi.org/10.3390/min10020195

Lendvay, Bertalan, Cartier, Laurent E., Gysi, Mario, Meyer, Joana B., Krzemnicki, Michael S., Kratzer, Adelgunde, & Morf, Nadja V. (2019). DNA fingerprinting: an effective tool for taxonomic identification of processed precious corals [Posted-content]. In bioRxiv (Cold Spring Harbor Laboratory). Cold Spring Harbor Laboratory. https://doi.org/10.1101/813865

Hügi, Michael, & Krzemnicki, Michael S. (2019). Swiss Gemmological Society Conference [Journal-article]. The Journal of Gemmology, 36(6), 558–560. https://doi.org/10.15506/jog.2019.36.6.558

Krzemnicki, Michael, Butini, Flavio, Butini, Enrico, & Carolis, Ernesto De. (2019). Gemmological Analysis of a Roman Sapphire Intaglio and Its Possible Origin. The Journal of Gemmology, 36(8), 710–724. https://doi.org/10.15506/jog.2019.36.8.710

Panczer, Gerard, Riondet, Geoffray, Forest, Lauriane, Krzemnicki, Michael S., Carole, Davy, & Faure, Florian. (2019). The Talisman of Charlemagne: New Historical and Gemological Discoveries. Gems & Gemology, 55(1), 30–46. https://doi.org/10.5741/gems.55.1.30

Phyo, Myint Myat, Bieler, Eva, Franz, Leander, Balmer, Walter, & Krzemnicki, Michael S. (2019). Spinel from Mogok, Myanmar - A detailed inclusion study by Raman microspectroscopy and scanning electron microscopy. The Journal of Gemmology, 36(5), 418–435. https://doi.org/10.15506/jog.2019.36.5.418

Cartier, L. E., Ali, S. H., & Krzemnicki, M. S. (2018). Blockchain, chain of custody and trace elements: An overview of tracking and traceability opportunities in the gem industry. Journal of Gemmology, 36(3), 212–227. https://doi.org/10.15506/jog.2018.36.3.212

Cartier, L. E., Krzemnicki, M. S., Lendvay, B., & Meyer, J. B. (2018). DNA fingerprinting of pearls, corals and ivory: A brief review of applications in gemmology. Journal of Gemmology, 36(2), 152–161. https://doi.org/10.15506/jog.2018.36.2.152

Hanser, C. S., Krzemnicki, M. S., Grünzweig, C., Harti, R. P., Betz, B., & Mannes, D. (2018). Neutron radiography and tomography: A new approach to visualize the internal structures of pearls. Journal of Gemmology, 36(1), 54–63. https://doi.org/10.15506/jog.2018.36.1.54

Krzemnicki, Michael S., Klumb, Alexander, & Braun, Judith. (2018). Unstable Colouration of Padparadscha-like Sapphires. The Journal of Gemmology, 36(4), 346–354. https://doi.org/10.15506/jog.2018.36.4.346

Wang, H. A. O., Cartier, L. E., Baumgartner, L. P., Bouvier, A.-S., Bégué, F., Chalain, J.-P., & Krzemnicki, M. S. (2018). A preliminary SIMS study using carbon isotopes to separate natural from synthetic diamonds. Journal of Gemmology, 36(1), 38–43. https://doi.org/10.15506/jog.2018.36.1.38

Chapman, J. G., Hügi, M. F., Krzemnicki, M. S., & Cartier, L. (2017). Conferences [Journal-article]. The Journal of Gemmology, 35(7), 668–673. https://doi.org/10.15506/jog.2017.35.7.668

Krzemnicki, Michael, Mannes, D., Hanser, C., Krzemnicki, M., Harti, R. P., Jerjen, I., & Lehmann, E. (2017). Gemmological Investigations on Pearls and Emeralds using Neutron Imaging. Physics Procedia, 88, 134–139. https://doi.org/10.1016/j.phpro.2017.06.018

Krzemnicki, M. S., & Cartier, L. E. (2017). Fake pearls made from Tridacna gigas shells. Journal of Gemmology, 35(5), 424–429. https://doi.org/10.15506/jog.2017.35.5.424

Krzemnicki, M. S., Cartier, L. E., & Hajdas, I. (2017). Radiocarbon age dating of 1,000-year-old pearls from the Cirebon shipwreck (Java, Indonesia). Journal of Gemmology, 35(8), 728–737. https://doi.org/10.15506/jog.2017.35.8.728

Krzemnicki, M. S., Hanser, C. S., & Revol, V. (2017). Simultaneous X-Radiography, phase-contrast and darkfield imaging to separate natural from cultured pearls. Journal of Gemmology, 35(7), 628–638. https://doi.org/10.15506/jog.2017.35.7.628

Revol, Vincent, Hanser, Carina, & Krzemnicki, Michael. (2016). Characterization of pearls by X-ray phase contrast imaging with a grating interferometer. Case Studies in Nondestructive Testing and Evaluation, 6, 1–7. https://doi.org/10.1016/j.csndt.2016.06.001

Wang, H. A. O., Krzemnicki, M. S., Chalain, J.-P., Lefèvre, P., Zhou, W., & Cartier, L. E. (2016). Simultaneous high sensitivity trace- element and isotopic analysis of gemstones using laser ablation inductively coupled plasma time-of-flight mass spectrometry. Journal of Gemmology, 35(3), 212–223. https://doi.org/10.15506/jog.2016.35.3.212

Schmetzer, K., & Krzemnicki, M. S. (2015). Nail-head spicules as inclusions in chrysoberyl from Myanmar. Journal of Gemmology, 34(5), 434–438. https://doi.org/10.15506/jog.2015.34.5.434

Krzemnicki, Michael S. (2013). The Science of Beauty: Chemical, spectroscopic, and mineralogical investigations of gemstones and pearls - New approaches in gemmological science [Habilitation].

Krzemnicki, Michael S., & Hajdas, Irka. (2013). Age Determination of Pearls: A New Approach for Pearl Testing and Identification. Radiocarbon, 55(2-3), 1801–1809. https://doi.org/10.2458/azu_js_rc.55.16389

Krzemnicki, M. S., & Hajdas, I. (2013). Age Determination of Pearls: A New Approach for Pearl Testing and Identification [Journal-article]. Radiocarbon, 55(3), 1801–1809. https://doi.org/10.1017/s0033822200048700

Meyer, Joana B., Cartier, Laurent E., Pinto-Figueroa, Eric A., Krzemnicki, Michael S., Hänni, Henry A., & McDonald, Bruce A. (2013). DNA Fingerprinting of Pearls to Determine Their Origins. PLoS, 8(10), e75606. https://doi.org/10.1371/journal.pone.0075606

Schmetzer, K., Krzemnicki, M. S., Hainschwang, T., & Bernhardt, H.-J. (2013). Natural and synthetic vanadium-bearing chrysoberyl [Journal-article]. The Journal of Gemmology, 33(7), 223–238. https://doi.org/10.15506/jog.2013.33.7.223

Cartier, Laurent E., Krzemnicki, Michael S., & Ito, Masahiro. (2012). Cultured Pearl Farming and Production in the Federated States of Micronesia. Gems & Gemology, 48(2), 108–122. https://doi.org/10.5741/gems.48.2.108

Krzemnicki, Michael S., Herzog, Franz, & Zhou, Wei. (2011). A Historic Turquoise Jewelry Set Containing Fossilized Dentine (Odontolite) and Glass. Gems & Gemology, 47(4), 296–301. https://doi.org/10.5741/gems.47.4.296

Karampelas, S., Michel, J., Zheng-Cui, M., Schwarz, J.-O., Enzmann, F., Fritsch, E., Leu, L., & Krzemnicki, M. (2010). X-ray computed microtomography applied to pearls: Methodology, advantages, and limitations. Gems and Gemology, 46(2), 122–127. https://doi.org/10.5741/gems.46.2.122

Hänni, H. A., Krzemnicki, M. S., & Cartier, L. (2010). Appearance of new bead material in cultured pearls [Journal-article]. The Journal of Gemmology, 32(1-4), 31–37. https://doi.org/10.15506/jog.2010.32.1-4.31

Krzemnicki, Michael S., Friess, Sebastian D., Chalus, Pascal, Hänni, Henry A., & Karampelas, Stefanos. (2010). X-Ray Computed Microtomography: Distinguishing Natural Pearls from Beaded and Non-Beaded Cultured Pearls. Gems & Gemology, 46(2), 128–134. https://doi.org/10.5741/gems.46.2.128

Rondeau, B., Mazzero, F., Bekele, E., Gauthier, J.-P., Lees, B. K., Beaton, D., Weldon, R., Laurs, B. M., Jang-Green, H., Hlaing, U. T., Choudhary, G., Lu, R., Befi, R., MacRi, M., Maras, A., Hyršl, J., Parenzan, C., Krzemnicki, M. S., Fritsch, E., et al. (2009). Gem news international. Gems and Gemology, 45(1), 59–75. https://doi.org/10.5741/gems.45.1.59

Krzemnicki, Michael, Schmetzer, Karl, Bernhardt, Heinz-Jürgen, & Dunaigre, Christian. (2007). Vanadium-bearing gem-quality tourmalines from Madagascar. The Journal of Gemmology, 30(7/8), 413–433. https://doi.org/10.15506/jog.2007.30.7.413

Schmetzer, K., Krzemnicki, M., Hänni, H. A., Bernhardt, H.-J., & Pettke, T. (2007). Gem-quality taaffeites and musgravites from Africa [Journal-article]. The Journal of Gemmology, 30(7), 367–382. https://doi.org/10.15506/jog.2007.30.7.367

Schmetzer, K., & Krzemnicki, M. (2006). The orientation and symmetry of light spots and asterism in rose quartz spheres from Madagascar [Journal-article]. The Journal of Gemmology, 30(3), 183–191. https://doi.org/10.15506/jog.2006.30.3.183

Hänni, H. A., & Krzemnicki, M. S. (2004). Pezzottaite, a new mineral and gem (supplement to ‘Caesium-rich morganite from Afghanistan and Madagascar’) [Journal-article]. The Journal of Gemmology, 29(2), 75. https://doi.org/10.15506/jog.2004.29.2.75

Krzemnicki, Michael S. (2004). Red and green labradorite feldspar from Congo. The Journal of Gemmology, 29(1), 15–23. https://doi.org/10.15506/jog.2004.29.1.15

Hänni, H. A., & Krzemnicki, M. S. (2003). Caesium-rich morganite from Afghanistan and Madagascar [Journal-article]. The Journal of Gemmology, 28(7), 417–429. https://doi.org/10.15506/jog.2003.28.7.417

Krzemnicki, M. S., Hänni, H. A., & Reusser, E. (2001). Colour-change garnets from Madagascar: comparison of colorimetric with chemical data [Journal-article]. The Journal of Gemmology, 27(7), 395–408. https://doi.org/10.15506/jog.2001.27.7.395

Kiefert, Lore, Schmetzer, Karl, Krzemnicki, Michael S., Bernhardt, Heinz-Jürgen, & Hänni, Henry A. (1996). Sapphires from Andranondambo area, Madagascar [Journal-article]. The Journal of Gemmology, 25(3), 185–209. https://doi.org/10.15506/jog.1996.25.3.185

Krzemnicki, M. S., Hänni, H. A., Guggenheim, R., & Mathys, D. (1996). Investigations on sapphires from an alkali basalt, South West Rwanda. The Journal of Gemmology, 25(2), 90–106. https://doi.org/10.15506/jog.1996.25.2.90