Radiocarbon 14C dating of pearls: From the study of cultural heritage to cultured pearl identification
2017 presentation by Dr. Michael Krzemnicki at Jewellery Matters Symposium at Rijksmuseum in Amsterdam (Netherlands).
Pigeon Blood Red & Royal Blue (2017)
GAHK seminar March 2017 on SSEF criteria for Pigeon blood red & Royal blue by Dr. Michael Krzemnicki (SSEF)
News from the SSEF (2015)
News from the SSEF Lab. 2015 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
L’identification du traitement HPHT au SSEF (2015)
Presentation by Jean-Pierre Chalain at 2015 Swiss Gemmological Society conference on HPHT treatment detection at SSEF
News from the SSEF (2014)
News from the SSEF Lab. 2014 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Outlook on pearl treatments and testing (2014)
Inhorgenta Pearl Forum talk by Dr. Michael S. Krzemnicki in February 2014.
Origin determination of gemstones (2014)
Presentation on origin determination of coloured gemstones by Dr. Michael Krzemnicki at 2014 Scottish Gemmological Conference.
ASDI: Automated Spectral Diamond Inspection (2014)
Talk by Jean-Pierre Chalain at 2014 Swiss Gemmological Society conference on the ASDI instrument developed by SSEF to detect colourless synthetic diamonds in melee batches.
A Western look on Fei Cui and Jadeite nomenclature (2013)
A Western look on Fei Cui and Jadeite nomenclature. Talk given by Dr. Michael Krzemnicki in Hong Kong at Gemmological Association of Hong Kong event in March 2013.
Corundum Treatment (2013)
Presentation on developments in treatments of ruby, sapphire and corundum. Focus on characteristics, detection and declaration. Talk given at 2013 Swiss Gemmological Society conference by Dr. Michael Krzemnicki.
News from the SSEF (2013)
News from the SSEF Lab. 2013 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Radiocarbon dating of pearls (2012)
Presentation by Dr. Michael Krzemnicki on Radiocarbon dating of pearls at 21st International Radiocarbon Conference in Paris, 9-13 July 2012.
Jade “Stone of gods”- appreciation and testing of Fei Cui (jadeite jade) (2012)
2012 Christie’s expert lecture by Dr. Michael Krzemnicki on jade, jadeite jade and Fei Cui.
Colourful Treasures of Nature: Ruby, Sapphire, Emerald & Pearls (2012)
2012 Christie’s expert lecture by Dr. Michael Krzemnicki on exceptional coloured gemstones and natural pearls.
Kashmir sapphire origin determination: potential and limitations (2012)
Presentation entitled “Kashmir sapphires: Potential and limitations of origin determination by chemical fingerprinting with LA ICP mass spectrometry”. GAHK seminar in June 2012.
News from the SSEF (2012)
News from the SSEF Lab. 2012 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Exceptional Pearls & new Pearl Developments (2012)
Presentation by Dr. Michael Krzemnicki at 2012 SGG conference in Switzerland.
Fancy coloured sapphires: the beauty beyond “blue” of sapphire and “red” of rubies (2011)
Presentation on the fascinating diversity and range of colours found in corundum, going far beyond the blue of sapphire and red of ruby.
News from the SSEF (2011)
News from the SSEF Lab. 2011 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Tokki Pearls: Additional cultured pearls formed during pearl cultivation: External and internal structures (2011)
Presented talk at International Gemmological Conference (IGC) in Interlaken (Switzerland) by Dr. Michael Krzemnicki of SSEF.
How to get the blues out of the pink- detection of low temperature treatment of pink sapphires (2010)
Latest research on detection of low temperature treatment of pink sapphires. Presentation by Dr. Michael Krzemnicki of SSEF.
X-ray micro computed tomography: an explanation of the procedures and benefits (2010)
Presentation on x-ray computed tomography during LMHC meeting in Bahrain in 2010.
News from the SSEF (2010)
News from the SSEF Lab. 2010 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Heating and diffusion processes on rubies: characteristics, detection and declaration (2010)
Talk on ruby treatments and terminology during CIBJO Ruby Day in Munich in February 2010.
Spinel: a gemstone on the rise (2010)
Talk given by Dr. Michael Krzemnicki in Hong Kong in 2010 about spinel, a gemstone increasingly in vogue. History, sources, origin determations, synthetics and treatments.
Gemstones and the fascination of colour (2010)
Christie’s Hong Kong Spring Auction lecture by Dr. Michael Krzemnicki. “Gemstones and the fascination of colour”
Diamond Testing at SSEF (2010)
2010 Swiss Gemmological Conference presentation by Jean-Pierre Chalain on diamond grading and testing practices at the Swiss Gemmological Institute (SSEF).
Visit to Tanzanian spinel and corundum deposits (2010)
Presentation at Swiss Gemmological Society about trip to spinel and corundum deposits in Tanzania in October 2009 by Dr. Walter Balmer and Dr. Michael Krzemnicki
New developments in pearl analysis: Radiocarbon 14C age dating (2009)
Talk given on radiocarbon dating of pearls at International Gemmological Conference (IGC) in Arusha (Tanzania) in 2009 by Dr. Michael Krzemnicki.
New developments in pearl analysis: X-ray micro tomography (2009)
Talk given on X-ray microtomography at International Gemmological Conference (IGC) in Arusha (Tanzania) in 2009 by Dr. Michael Krzemnicki.
About the platelet peak of HPHT-treated diamonds of type 1a (2009)
Presentation at 2009 European Gemmological Symposium (Bern, Switzerland) by Jean-Pierre Chalain on the platelet peak of HPHT-treated diamonds of type Ia.
LA-ICP-MS in gemmology (2009)
2009 European Gemmological Symposium presentation (by Dr. Michael Krzemnicki) about different applications of Laser Ablation Inductively Coupled Mass Spectrometry in gemmology.