Padparadscha-like Fancy sapphires with Unstable Colours: Colouration Mechanisms and Disclosure. Publihsed in InColor, 2019, No. 41, 92-94.
News from the SSEF Lab. 2018 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
New Sapphires from Ambatondrazaka, Madagascar. Published in Journal of Gemmology, 2017, 35, 5, 391-392.
Author(s): M.S. Krzemnicki
Presentation on the fascinating diversity and range of colours found in corundum, going far beyond the blue of sapphire and red of ruby.
Author(s): M.S. Krzemnicki
Edelsteine der Korundgruppe. Published in Schweirische Uhrmacher- und Goldschmiede Zeitung, 1991.
Author(s): H.A. Haenni