Coloured Gemstones

GAHK seminar March 2017 on Pigeon blood red & Royal blue by Dr. Michael Krzemnicki (SSEF)

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Origin determination of gemstones (Scottish Gemmological Conference, May 2014)

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Corundum treatment (SGG, April 2013)

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A Western look on Fei Cui and Jadeite nomenclature (GAHK, March 2013)

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Treatment of corundum: characteristics, detection and declaration (SGG, 2013)

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Kashmir sapphires: Potential and limitations of origin determination by chemical fingerprinting with LA ICP mass spectrometry (2012)

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Jade "Stone of gods"- appreciation and testing of Fei Cui (jadeite jade) (2012)

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Colourful Treasures of Nature: Ruby, Sapphire, Emerald & Pearls (2012)

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Bastnäsite from Pakistan coloured by Rare Earth Elements (REE), exhibiting a colour-change

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Fancy coloured sapphires: the beauty beyond "blue" of sapphire and "red" of rubies (2011)

 

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How to get the blues out of the pink- detection of low temperature treatment of pink sapphires (2010)

 

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Spinel: a gemstone on the rise (2010)

 

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Gemstones and the fascination of colour (2010)

 

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Heating and diffusion processes on rubies: characteristics, detection and declaration (2010)

 

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Visit to Tanzanian spinel and corundum deposits (2010)

 

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LA-ICP-MS in gemmology (2009)

 

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