Tag : Sapphire

Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite

Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite. Published in Journal of the Gemmological Association of Hong Kong GAHK, 34, 62-64

Author(s): M.S. Krzemnicki

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Corundum treatment

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.

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Kashmir sapphire origin determination: potential and limitations

Presentation entitled “Kashmir sapphires: Potential and limitations of origin determination by chemical fingerprinting with LA ICP mass spectrometry”. GAHK seminar in June 2012 by Dr. Michael S. Krzemnicki.

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