Origin of gem corundum in calcite marble: The Revelstoke occurrence in the Canadian Cordillera of British Columbia
Origin of gem corundum in calcite marble: The Revelstok […]
Be-detection by FTIR on corundum; a preliminary report
Be-detection by FTIR on corundum; a preliminary report. […]
Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite
Some uncommon sapphire “imitations”: Blue Co-zirconia, […]
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.
Kashmir sapphire origin determination: potential and limitations (2012)
Presentation by Dr. Michael Krzemnicki at 2012 SGG conference in Switzerland.
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.
Fancy coloured sapphires: the beauty beyond “blue” of sapphire and “red” of rubies (2011)
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
Saphirs de couleur fantaisie, diversité multicolore d’une gemme classique
Saphirs de couleur fantaisie; diversité multicolore d&# […]
Fantasiefarbene Saphire: Die attraktive Farbenvielfalt eines klassischen Edelsteins
Fantasiefarbene Saphire: Die attraktive Farbenvielfalt […]